Remove duplicated "Cron jobs" section and update reference to this

doc/ci/pipelines/schedules.md

@@ -86,7 +86,7 @@ To change the Sidekiq worker's frequency:
 1. Edit the `gitlab_rails['pipeline_schedule_worker_cron']` value in your instance's `gitlab.rb` file.
 1. [Reconfigure GitLab](../../administration/restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to take effect.
 
-For GitLab.com, refer to the [dedicated settings page](../../user/gitlab_com/index.md#cron-jobs).
+For GitLab.com, refer to the [dedicated settings page](../../user/gitlab_com/index.md#gitlab-cicd).
 
 ## Working with scheduled pipelines
 

doc/user/gitlab_com/index.md

@@ -372,15 +372,6 @@ NOTE: **Note:**
 The `SIDEKIQ_MEMORY_KILLER_MAX_RSS` setting is `16000000` on Sidekiq import
 nodes and Sidekiq export nodes.
 
-## Cron jobs
-
-Periodically executed jobs by Sidekiq, to self-heal GitLab, do external
-synchronizations, run scheduled pipelines, etc.:
-
-| Setting                     | GitLab.com   | Default      |
-|--------                     |------------- |------------- |
-| `pipeline_schedule_worker`  | `*/5 * * * *` | `19 * * * *` |
-
 ## PostgreSQL
 
 GitLab.com being a fairly large installation of GitLab means we have changed