SYNC-5090 remove unneeded metrics (mozilla#7189)

We've been experimenting with new metrics dashboards, but when these
were plotted they didn't seem useful at all.

Author: bendk

components/fxa-client/android/metrics.yaml

@@ -2,56 +2,9 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-# This file defines the metrics that will be gathered for the "fxaclient"
-# storage component.
-# These are emitted for all users of the component.  Additional metrics
-# specific to the *syncing* of fxaclient are defined in a separate "sync_ping"
-# package.
-#
-# Changes to these metrics require data review, which should take into
-# consideration
-# the following known consumers of the fxaclient component Android bindings:
-#
-#  * Fenix for Android
+# Empty metrics file that we keep around since we used to have metrics defined and removing the file
+# entirely caused issues with the Glean pipeline:
+# https://github.com/mozilla/probe-scraper/pull/990
 
 ---
 $schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
-
-fxa_client:
-  operation_count:
-    type: counter
-    description: The total number of operations performed by the FxA client.
-    bugs:
-      - https://github.com/mozilla/application-services/issues/5871
-    data_reviews:
-      - https://github.com/mozilla/application-services/issues/5872
-    data_sensitivity:
-      - interaction
-    notification_emails:
-      - bdk@mozilla.com
-      - synced-client-integrations@mozilla.com
-    expires: "never"
-
-  error_count:
-    type: labeled_counter
-    description: >
-      The total number of errors encountered during FxA operations, labeled by type.
-      It is intended to be used together with `operation_count` to measure
-      the overall error rate of FxA operations operations.
-    labels:
-      - network
-      - authentication
-      - no_existing_auth_flow
-      - origin_mismatch
-      - fxa_other
-      - unexpected
-    bugs:
-      - https://github.com/mozilla/application-services/issues/5871
-    data_reviews:
-      - https://github.com/mozilla/application-services/issues/5872
-    data_sensitivity:
-      - interaction
-    notification_emails:
-      - bdk@mozilla.com
-      - synced-client-integrations@mozilla.com
-    expires: "never"