Remove metrics that keeps count of deleted container images

Changelog: other
EE: true

config/metrics/counts_all/20210216182907_package_events_i_package_container_delete_package.yml

@@ -7,7 +7,8 @@ product_stage: package
 product_group: group::package
 product_category: container registry
 value_type: number
-status: deprecated
+status: removed
+milestone_removed: "14.4"
 time_frame: all
 data_source: redis
 distribution:

ee/spec/config/metrics/every_metric_definition_spec.rb

@@ -14,6 +14,7 @@ RSpec.describe 'Every metric definition' do
       package_events_i_package_container_push_package
       package_events_i_package_container_pull_package
       package_events_i_package_debian_push_package
+      package_events_i_package_container_delete_package
     ).freeze
   end