Remove gitlab_transaction_queue_duration_total

doc/administration/monitoring/prometheus/gitlab_metrics.md

@@ -88,7 +88,6 @@ The following metrics are available:
 | `gitlab_transaction_event_stuck_import_jobs_total`               | Counter     | 9.4     | Count of stuck import jobs                                                                                            | `projects_without_jid_count`, `projects_with_jid_count`   |
 | `gitlab_transaction_event_update_build_total`                    | Counter     | 9.4     | Counter for update build for API `/jobs/request/:id`                                                                  |                                                           |
 | `gitlab_transaction_new_redis_connections_total`                 | Counter     | 9.4     | Counter for new Redis connections                                                                                     |                                                           |
-| `gitlab_transaction_queue_duration_total`                        | Counter     | 9.4     | Duration jobs were enqueued before processing                                                                         |                                                           |
 | `gitlab_transaction_rails_queue_duration_total`                  | Counter     | 9.4     | Measures latency between GitLab Workhorse forwarding a request to Rails                                               | `controller`, `action`                                    |
 | `gitlab_transaction_view_duration_total`                         | Counter     | 9.4     | Duration for views                                                                                                    | `controller`, `action`, `view`                            |
 | `gitlab_view_rendering_duration_seconds`                         | Histogram   | 10.2    | Duration for views (histogram)                                                                                        | `controller`, `action`, `view`                            |