Remove dependabot to fix fork spamming

See https://github.com/dependabot/dependabot-core/issues/2198

.github/dependabot.yml

@@ -1,22 +0,0 @@
-# Docs: <https://docs.github.com/en/free-pro-team@latest/github/administering-a-repository/customizing-dependency-updates>
-
-version: 2
-
-updates:
-  - package-ecosystem: gomod
-    directory: /
-    schedule: {interval: weekly}
-    reviewers: [42wim]
-    assignees: [42wim]
-
-  - package-ecosystem: github-actions
-    directory: /
-    schedule: {interval: weekly}
-    reviewers: [42wim]
-    assignees: [42wim]
-
-  - package-ecosystem: docker
-    directory: /
-    schedule: {interval: weekly}
-    reviewers: [42wim]
-    assignees: [42wim]