[recovery] Delete unused metric definitions for the recovery project

The following metrics are unused and can be deleted:
* recovery_event
* ota_download_status
* ota_download_duration

Bug: 448972154
Change-Id: Ia7b6b41a0472212b6ad8340d5c72a1f15b398319
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/1417098
Reviewed-by: Mike Comfoltey <comfoltey@google.com>
Reviewed-by: Alex Pankhurst <pankhurst@google.com>
Commit-Queue: Sarah Hammond <sarahhammond@google.com>
Privacy-Approval: Alex Pankhurst <pankhurst@google.com>
diff --git a/fuchsia/recovery/metrics.yaml b/fuchsia/recovery/metrics.yaml
index 70ec266..032468c 100644
--- a/fuchsia/recovery/metrics.yaml
+++ b/fuchsia/recovery/metrics.yaml
@@ -12,95 +12,4 @@
 # Next Metric ID: 4
 ################################################################################
 
-################################################################################
-# ota_download_duration
-#
-# A histogram and logged to Cobalt for every ota, of the time taken for the ota
-# download to complete, in seconds.
-################################################################################
-- id: 1
-  metric_name: ota_download_duration
-  metric_type: INTEGER
-  metric_semantics: [METRIC_SEMANTICS_UNSPECIFIED]
-  metric_units: SECONDS
-  reports:
-    - report_name: histogram
-      id: 1
-      report_type: FLEETWIDE_HISTOGRAMS
-      system_profile_selection: REPORT_ALL
-      privacy_mechanism: DE_IDENTIFICATION
-      int_buckets:
-        linear:
-          floor: 0
-          num_buckets: 100
-          step_size: 15  # 15 seconds
-      system_profile_field: [BOARD_NAME, PRODUCT_NAME, CHANNEL, SYSTEM_VERSION]
-  meta_data:
-    max_release_stage: GA
-    expiration_date: "2023/05/10"
-
-################################################################################
-# ota_download_status
-#
-# Pass or Fail
-################################################################################
-- id: 2
-  metric_name: ota_download_status
-  metric_type: OCCURRENCE
-  metric_semantics: [METRIC_SEMANTICS_UNSPECIFIED]
-  metric_dimensions:
-  - dimension: result
-    event_codes:
-      0: Unknown
-      1: Success
-      2: Failure
-  reports:
-    #####################################################################
-    # ota_download_counts
-    #
-    # This is a report used for the ota performed by the recovery.
-    # For each day, we count the total number of occurrences over the
-    # fleet of each error type.
-    #####################################################################
-    - report_name: ota_counts
-      id: 1
-      report_type: FLEETWIDE_OCCURRENCE_COUNTS
-      privacy_mechanism: DE_IDENTIFICATION
-      system_profile_field: [BOARD_NAME, PRODUCT_NAME, CHANNEL, SYSTEM_VERSION]
-  meta_data:
-    max_release_stage: GA
-    expiration_date: "2023/05/10"
-
-################################################################################
-# recovery_event
-#
-# Individual events that mark the start of each stage.
-################################################################################
-- id: 3
-  metric_name: recovery_event
-  metric_type: OCCURRENCE
-  metric_semantics: [METRIC_SEMANTICS_UNSPECIFIED]
-  metric_dimensions:
-  - dimension: result
-    event_codes:
-      0: Unknown
-      1: WiFi_Connected
-      2: OTA_Started
-      3: OTA_Success
-      4: OTA_Failed
-      5: Storaged_Reprovisioned
-  reports:
-    ###########################################################################
-    # recovery_events
-    #
-    # This is a report to show the progress of recovery. For each day, we count
-    # the total number of occurrences over the fleet of each event code.
-    ###########################################################################
-    - report_name: recovery_events
-      id: 1
-      report_type: FLEETWIDE_OCCURRENCE_COUNTS
-      privacy_mechanism: DE_IDENTIFICATION
-      system_profile_field: [BOARD_NAME, PRODUCT_NAME, CHANNEL, SYSTEM_VERSION]
-  meta_data:
-    max_release_stage: GA
-    expiration_date: "2023/05/10"
+deleted_metric_ids: [1, 2, 3]