Remove ce-ee merge documentation

doc/development/README.md

@@ -19,7 +19,6 @@ description: 'Learn how to contribute to GitLab.'
 - [Code review guidelines](code_review.md) for reviewing code and having code reviewed
 - [Database review guidelines](database_review.md) for reviewing database-related changes and complex SQL queries
 - [Pipelines for the GitLab project](pipelines.md)
-- [Automatic CE->EE merge](automatic_ce_ee_merge.md)
 - [Guidelines for implementing Enterprise Edition features](ee_features.md)
 - [Security process for developers](https://gitlab.com/gitlab-org/release/docs/blob/master/general/security/developer.md#security-releases-critical-non-critical-as-a-developer)
 - [Requesting access to Chatops on GitLab.com](chatops_on_gitlabcom.md#requesting-access) (for GitLabbers)

doc/workflow/gitlab_flow.md

@@ -168,7 +168,6 @@ This branch is the place for any work related to this change.
 
 NOTE: **Note:**
 The name of a branch might be dictated by organizational standards.
-For example, in GitLab, any branches in GitLab EE that are equivalent to branches in GitLab CE [must end in `-ee`](../development/automatic_ce_ee_merge.md#cherry-picking-from-ce-to-ee).
 
 When you are done or want to discuss the code, open a merge request.
 A merge request is an online place to discuss the change and review the code.