For #20127: remove app_opened_all_startup from metrics.yaml.

app/metrics.yaml

@@ -8,81 +8,6 @@ no_lint:
   - CATEGORY_GENERIC
 
 events:
-  app_opened_all_startup:
-    type: event
-    description: |
-      **This probe has a known flaw:** for COLD start up, it doesn't take into
-      account if the process is already running when the app starts, possibly
-      inflating results (e.g. a Service started the process 20min ago and only
-      now is HomeActivity launching). See the `cold_*_app_to_first_frame` probes
-      for a replacement.
-      <br><br>
-      A user opened the app to the HomeActivity. The HomeActivity
-      encompasses the home screen, browser screen, settings screen,
-      collections and other screens in the nav_graph.
-      This differs from the app_opened probe because it measures all
-      startups, not just cold startup. Note: There is a short gap
-      between the time application goes into background and the time
-      android reports the application going into the background.
-      Note: This metric does not record souce when app opened from
-      task switcher: open application -> press home button -> open
-      recent tasks -> choose fenix. In this case will report
-      [source = unknown, type = hot, has_saved_instance_state = false].
-    extra_keys:
-      type:
-        description: |
-          the startup type for opening fenix. the application and HomeActivity
-          either needs to be created or started again. possible values are
-          `cold`, `warm`, `hot` or `error`. Error is for impossible cases.
-          Please file a bug if you see the error case.
-          app created AND HomeActivity created = cold
-          app started AND HomeActivity created = warm
-          app started AND HomeActivity started = hot
-          app created AND HomeActivity started = error
-          Some applications such as gmail launches the default browser in the
-          background. So when we eventually click a link, browser is already
-          started in the background. This means that custom_tab will mostly
-          report `warm` startup type.
-      source:
-        description: |
-          The method used to open Fenix. Possible values are `app_icon`,
-          `custom_tab`, `link` or `unknown`. unknown is for startup sources
-          where we can't pinpoint the cause. One UNKNOWN case is the app
-          switcher where we don't know what variables to check to ensure this
-          startup wasn't caused by something else.
-      has_saved_instance_state:
-        description: |
-          boolean value whether or not startup type has a savedInstance.
-          using savedInstance, HomeActivity's previous state can be restored.
-          This is an optional key since it is not applicable to all the cases.
-          for example, when we are doing a hot start up, we cant have a
-          savedInstanceState therefore we report only [APP_ICON, HOT] instead
-          of [APP_ICON, HOT, false].
-      first_frame_pre_draw_nanos:
-        description: |
-          the number of nanoseconds the application took to launch. This is the
-          time difference between application launch(user pressing app_icon,
-          launching a link) and until the first view is about to be drawn
-          on the screen. If the time is not captured, this extra key will
-          not be reported.
-    bugs:
-      - https://github.com/mozilla-mobile/fenix/issues/11830
-      - https://github.com/mozilla-mobile/fenix/issues/12573
-      - https://github.com/mozilla-mobile/fenix/pull/13494
-      - https://github.com/mozilla-mobile/fenix/issues/10069
-      - https://github.com/mozilla-mobile/fenix/issues/19923
-    data_reviews:
-      - https://github.com/mozilla-mobile/fenix/pull/12114#pullrequestreview-445245341
-      - https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877
-      - https://github.com/mozilla-mobile/fenix/pull/13494#pullrequestreview-474050499
-      - https://github.com/mozilla-mobile/fenix/pull/15605#issuecomment-702365594
-      - https://github.com/mozilla-mobile/fenix/pull/19924#issuecomment-861423789
-    data_sensitivity:
-      - interaction
-    notification_emails:
-      - esmyth@mozilla.com
-      - perf-android-fe@mozilla.com
-    expires: "2021-12-01"
   app_received_intent:
     type: event
     description: |