Remove services from Migration/UpdateLargeTable

After https://gitlab.com/gitlab-org/gitlab/-/merge_requests/35221 we
removed 2.93M records out of the total 3.74M records in the services
table (~78%).

rubocop/rubocop-migrations.yml

@@ -28,7 +28,6 @@ Migration/UpdateLargeTable:
     - :resource_label_events
     - :routes
     - :sent_notifications
-    - :services
     - :system_note_metadata
     - :taggings
     - :todos