Remove FF ci_namespace_project_mirrors

Changelog: other

app/services/ci/process_sync_events_service.rb

@@ -13,8 +13,6 @@ module Ci
     end
 
     def execute
-      return unless ::Feature.enabled?(:ci_namespace_project_mirrors, default_enabled: :yaml)
-
       # preventing parallel processing over the same event table
       try_obtain_lease { process_events }
 

config/feature_flags/development/ci_namespace_project_mirrors.yml

----
-name: ci_namespace_project_mirrors
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/75517
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/346786
-milestone: '14.6'
-type: development
-group: group::sharding
-default_enabled: false

spec/services/ci/process_sync_events_service_spec.rb

@@ -62,16 +62,6 @@ RSpec.describe Ci::ProcessSyncEventsService do
         end
       end
 
-      context 'when the FF ci_namespace_project_mirrors is disabled' do
-        before do
-          stub_feature_flags(ci_namespace_project_mirrors: false)
-        end
-
-        it 'does nothing' do
-          expect { execute }.not_to change(Projects::SyncEvent, :count)
-        end
-      end
-
       it 'does not delete non-executed events' do
         new_project = create(:project)
         sync_event_class.delete_all