diff --git a/.taskcluster.yml b/.taskcluster.yml
deleted file mode 100644
index f1fd7be3ee..0000000000
--- a/.taskcluster.yml
+++ /dev/null
@@ -1,293 +0,0 @@
----
-version: 1
-reporting: checks-v1
-policy:
-    # XXX We restrict taskcluster to collaborators so priviledged tests (like UI tests) can run on PRs
-    pullRequests: collaborators
-tasks:
-    - $let:
-        trustDomain: mobile
-
-        # Github events have this stuff in different places...
-        ownerEmail:
-            $if: 'tasks_for in ["cron", "action"]'
-            then: '${tasks_for}@noreply.mozilla.org'
-            else:
-                $if: 'tasks_for == "github-push"'
-                then:
-                    $if: 'event.pusher.email'
-                    then: '${event.pusher.email}'
-                    else: '${event.pusher.name}@users.noreply.github.com'
-                else:
-                    $if: 'tasks_for == "github-pull-request"'
-                    then: '${event.pull_request.user.login}@users.noreply.github.com'
-        baseRepoUrl:
-            $if: 'tasks_for == "github-push"'
-            then: '${event.repository.html_url}'
-            else:
-                $if: 'tasks_for == "github-pull-request"'
-                then: '${event.pull_request.base.repo.html_url}'
-                else:
-                    $if: 'tasks_for in ["cron", "action"]'
-                    then: '${repository.url}'
-        repoUrl:
-            $if: 'tasks_for == "github-push"'
-            then: '${event.repository.html_url}'
-            else:
-                $if: 'tasks_for == "github-pull-request"'
-                then: '${event.pull_request.head.repo.html_url}'
-                else:
-                    $if: 'tasks_for in ["cron", "action"]'
-                    then: '${repository.url}'
-        project:
-            $if: 'tasks_for == "github-push"'
-            then: '${event.repository.name}'
-            else:
-                $if: 'tasks_for == "github-pull-request"'
-                then: '${event.pull_request.head.repo.name}'
-                else:
-                    $if: 'tasks_for in ["cron", "action"]'
-                    then: '${repository.project}'
-        head_branch:
-            $if: 'tasks_for == "github-pull-request"'
-            then: ${event.pull_request.head.ref}
-            else:
-                $if: 'tasks_for == "github-push"'
-                then: ${event.ref}
-                else:
-                    $if: 'tasks_for in ["action", "cron"]'
-                    then: '${push.branch}'
-        head_sha:
-            $if: 'tasks_for == "github-push"'
-            then: '${event.after}'
-            else:
-                $if: 'tasks_for == "github-pull-request"'
-                then: '${event.pull_request.head.sha}'
-                else:
-                    $if: 'tasks_for in ["action", "cron"]'
-                    then: '${push.revision}'
-        ownTaskId:
-            $if: '"github" in tasks_for'
-            then: {$eval: as_slugid("decision_task")}
-            else:
-                $if: 'tasks_for in ["cron", "action"]'
-                then: '${ownTaskId}'
-        pullRequestAction:
-            $if: 'tasks_for == "github-pull-request"'
-            then: ${event.action}
-            else: 'UNDEFINED'
-      in:
-        $if: >
-            tasks_for in ["action", "cron"]
-            || (tasks_for == "github-pull-request" && pullRequestAction in ["opened", "reopened", "synchronize"])
-            || (tasks_for == "github-push" && head_branch[:10] != "refs/tags/") && (head_branch != "staging.tmp") && (head_branch != "trying.tmp") && (head_branch[:8] != "mergify/")
-        then:
-            $let:
-                level:
-                    $if: 'tasks_for in ["github-push", "action", "cron"] && repoUrl == "https://github.com/mozilla-mobile/fenix"'
-                    then: '3'
-                    else: '1'
-                short_head_branch:
-                    $if: 'head_branch[:11] == "refs/heads/"'
-                    then: {$eval: 'head_branch[11:]'}
-            in:
-                taskId:
-                    $if: 'tasks_for != "action"'
-                    then: '${ownTaskId}'
-                taskGroupId:
-                    $if: 'tasks_for == "action"'
-                    then: '${action.taskGroupId}'
-                    else: '${ownTaskId}'  # same as taskId; this is how automation identifies a decision task
-                schedulerId: '${trustDomain}-level-${level}'
-                created: {$fromNow: ''}
-                deadline: {$fromNow: '1 day'}
-                expires: {$fromNow: '1 year 1 second'}  # 1 second so artifacts expire first, despite rounding errors
-                metadata:
-                    $merge:
-                        - owner: "${ownerEmail}"
-                          source: '${repoUrl}/raw/${head_sha}/.taskcluster.yml'
-                        - $if: 'tasks_for in ["github-push", "github-pull-request"]'
-                          then:
-                            name: "Decision Task"
-                            description: 'The task that creates all of the other tasks in the task graph'
-                          else:
-                            $if: 'tasks_for == "action"'
-                            then:
-                                name: "Action: ${action.title}"
-                                description: |
-                                    ${action.description}
-
-                                    Action triggered by clientID `${clientId}`
-                            else:
-                                name: "Decision Task for cron job ${cron.job_name}"
-                                description: 'Created by a [cron task](https://firefox-ci-tc.services.mozilla.com/tasks/${cron.task_id})'
-                provisionerId: "${trustDomain}-${level}"
-                workerType: "decision-gcp"
-                tags:
-                    $if: 'tasks_for in ["github-push", "github-pull-request"]'
-                    then:
-                        kind: decision-task
-                    else:
-                        $if: 'tasks_for == "action"'
-                        then:
-                            kind: 'action-callback'
-                        else:
-                            $if: 'tasks_for == "cron"'
-                            then:
-                                kind: cron-task
-                routes:
-                    $flattenDeep:
-                        - checks
-                        - $if: 'level == "3" || repoUrl == "https://github.com/mozilla-releng/staging-fenix"'
-                          then:
-                            - tc-treeherder.v2.${project}.${head_sha}
-                            # TODO Bug 1601928: Make this scope fork-friendly once ${project} is better defined. This will enable
-                            # staging release promotion on forks.
-                        - $if: 'tasks_for == "github-push"'
-                          then:
-                            - index.${trustDomain}.v2.${project}.branch.${short_head_branch}.latest.taskgraph.decision
-                            - index.${trustDomain}.v2.${project}.branch.${short_head_branch}.revision.${head_sha}.taskgraph.decision
-                            - index.${trustDomain}.v2.${project}.revision.${head_sha}.taskgraph.decision
-                        - $if: 'tasks_for == "cron"'
-                          then:
-                            # cron context provides ${head_branch} as a short one
-                            - index.${trustDomain}.v2.${project}.branch.${head_branch}.latest.taskgraph.decision-${cron.job_name}
-                            - index.${trustDomain}.v2.${project}.branch.${head_branch}.revision.${head_sha}.taskgraph.decision-${cron.job_name}
-                            - index.${trustDomain}.v2.${project}.branch.${head_branch}.revision.${head_sha}.taskgraph.cron.${ownTaskId}
-                scopes:
-                    $if: 'tasks_for == "github-push"'
-                    then:
-                        # `https://` is 8 characters so, ${repoUrl[8:]} is the repository without the protocol.
-                        - 'assume:repo:${repoUrl[8:]}:branch:${short_head_branch}'
-                    else:
-                        $if: 'tasks_for == "github-pull-request"'
-                        then:
-                            - 'assume:repo:github.com/${event.pull_request.base.repo.full_name}:pull-request'
-                        else:
-                            $if: 'tasks_for == "action"'
-                            then:
-                                # when all actions are hooks, we can calculate this directly rather than using a variable
-                                - '${action.repo_scope}'
-                            else:
-                                - 'assume:repo:${repoUrl[8:]}:cron:${cron.job_name}'
-
-                requires: all-completed
-                priority: lowest
-                retries: 5
-                payload:
-                    env:
-                        # run-task uses these to check out the source; the inputs
-                        # to `mach taskgraph decision` are all on the command line.
-                        $merge:
-                            - MOBILE_BASE_REPOSITORY: '${baseRepoUrl}'
-                              MOBILE_HEAD_REPOSITORY: '${repoUrl}'
-                              MOBILE_HEAD_REF: '${head_branch}'
-                              MOBILE_HEAD_REV: '${head_sha}'
-                              MOBILE_REPOSITORY_TYPE: git
-                              MOBILE_PIP_REQUIREMENTS: taskcluster/requirements.txt
-                              MOZ_AUTOMATION: "1"
-                              REPOSITORIES: {$json: {mobile: "Fenix"}}
-                              HG_STORE_PATH: /builds/worker/checkouts/hg-store
-                              ANDROID_SDK_ROOT: /builds/worker/android-sdk
-                            - $if: 'tasks_for in ["github-pull-request"]'
-                              then:
-                                MOBILE_PULL_REQUEST_NUMBER: '${event.pull_request.number}'
-                            - $if: 'tasks_for == "action"'
-                              then:
-                                ACTION_TASK_GROUP_ID: '${action.taskGroupId}'  # taskGroupId of the target task
-                                ACTION_TASK_ID: {$json: {$eval: 'taskId'}}  # taskId of the target task (JSON-encoded)
-                                ACTION_INPUT: {$json: {$eval: 'input'}}
-                                ACTION_CALLBACK: '${action.cb_name}'
-                    features:
-                        taskclusterProxy: true
-                        chainOfTrust: true
-                        # Note: This task is built server side without the context or tooling that
-                        # exist in tree so we must hard code the hash
-                    image: mozillareleases/taskgraph:decision-mobile-625975b642c148be4c6f1d8ee5cedf7399f5d0dd33d275ff69d5934e3082d4a9@sha256:bfb26700182486e1c6c52701baea6f386fa39e5e25417423c27845933605ad43
-
-                    maxRunTime: 1800
-
-                    command:
-                        - /usr/local/bin/run-task
-                        - '--mobile-checkout=/builds/worker/checkouts/src'
-                        - '--task-cwd=/builds/worker/checkouts/src'
-                        - '--'
-                        - bash
-                        - -cx
-                        - $let:
-                            extraArgs:
-                                $if: 'tasks_for == "cron"'
-                                then: '${cron.quoted_args}'
-                                else: ''
-                          in:
-                            $if: 'tasks_for == "action"'
-                            then: >
-                                taskcluster/scripts/decision-install-sdk.sh &&
-                                ln -s /builds/worker/artifacts artifacts &&
-                                ~/.local/bin/taskgraph action-callback
-                            else: >
-                                taskcluster/scripts/decision-install-sdk.sh &&
-                                ln -s /builds/worker/artifacts artifacts &&
-                                ~/.local/bin/taskgraph decision
-                                --pushlog-id='0'
-                                --pushdate='0'
-                                --project='${project}'
-                                --message=""
-                                --owner='${ownerEmail}'
-                                --level='${level}'
-                                --base-repository="$MOBILE_BASE_REPOSITORY"
-                                --head-repository="$MOBILE_HEAD_REPOSITORY"
-                                --head-ref="$MOBILE_HEAD_REF"
-                                --head-rev="$MOBILE_HEAD_REV"
-                                --repository-type="$MOBILE_REPOSITORY_TYPE"
-                                --tasks-for='${tasks_for}'
-                                ${extraArgs}
-
-                    artifacts:
-                        'public':
-                            type: 'directory'
-                            path: '/builds/worker/artifacts'
-                            expires:
-                                $fromNow: '1 year'
-                        'public/docker-contexts':
-                            type: 'directory'
-                            path: '/builds/worker/checkouts/src/docker-contexts'
-                            # This needs to be at least the deadline of the
-                            # decision task + the docker-image task deadlines.
-                            # It is set to a week to allow for some time for
-                            # debugging, but they are not useful long-term.
-                            expires:
-                                $fromNow: '7 day'
-
-                extra:
-                    $merge:
-                        - treeherder:
-                            $merge:
-                                - machine:
-                                    platform: gecko-decision
-                                - $if: 'tasks_for in ["github-push", "github-pull-request"]'
-                                  then:
-                                    symbol: D
-                                  else:
-                                    $if: 'tasks_for == "action"'
-                                    then:
-                                        groupName: 'action-callback'
-                                        groupSymbol: AC
-                                        symbol: "${action.symbol}"
-                                    else:
-                                        groupSymbol: cron
-                                        symbol: "${cron.job_symbol}"
-                        - $if: 'tasks_for == "action"'
-                          then:
-                            parent: '${action.taskGroupId}'
-                            action:
-                                name: '${action.name}'
-                                context:
-                                    taskGroupId: '${action.taskGroupId}'
-                                    taskId: {$eval: 'taskId'}
-                                    input: {$eval: 'input'}
-                                    clientId: {$eval: 'clientId'}
-                        - $if: 'tasks_for == "cron"'
-                          then:
-                            cron: {$json: {$eval: 'cron'}}
-                        - tasks_for: '${tasks_for}'
diff --git a/taskcluster/scripts/decision-install-sdk.sh b/taskcluster/scripts/decision-install-sdk.sh
deleted file mode 100755
index 0d2afac6aa..0000000000
--- a/taskcluster/scripts/decision-install-sdk.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-export CURL='curl --location --retry 5'
-
-ANDROID_SDK_VERSION='3859397'
-ANDROID_SDK_SHA256='444e22ce8ca0f67353bda4b85175ed3731cae3ffa695ca18119cbacef1c1bea0'
-SDK_ZIP_LOCATION="$HOME/sdk-tools-linux.zip"
-
-# For the Android build system we want Java 11. However this version of sdkmanager requires Java 8.
-JAVA8PATH="/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/:$PATH"
-
-$CURL --output "$SDK_ZIP_LOCATION" "https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_VERSION}.zip"
-echo "$ANDROID_SDK_SHA256  $SDK_ZIP_LOCATION" | sha256sum --check
-unzip -d "$ANDROID_SDK_ROOT" "$SDK_ZIP_LOCATION"
-rm "$SDK_ZIP_LOCATION"
-
-yes | PATH=$JAVA8PATH "${ANDROID_SDK_ROOT}/tools/bin/sdkmanager" --licenses
-