Merge branch 'readme_merge_request_duplication' into 'master'

remove duplicated lines

Closes #5998

See merge request gitlab-org/gitlab-ee!5690

doc/README.md

@@ -117,14 +117,6 @@ Manage your [repositories](user/project/repository/index.md) from the UI (user i
 
 #### Merge Requests
 
-- [Merge Requests](user/project/merge_requests/index.md)
-  - [Work In Progress "WIP" Merge Requests](user/project/merge_requests/work_in_progress_merge_requests.md)
-  - [Merge Request discussion resolution](user/discussions/index.md#moving-a-single-discussion-to-a-new-issue): Resolve discussions, move discussions in a merge request to an issue, only allow merge requests to be merged if all discussions are resolved.
-  - [Checkout merge requests locally](user/project/merge_requests/index.md#checkout-merge-requests-locally)
-  - [Cherry-pick](user/project/merge_requests/cherry_pick_changes.md)
-
-#### Merge Requests
-
 - [Merge Requests](user/project/merge_requests/index.md)
   - [Work In Progress "WIP" Merge Requests](user/project/merge_requests/work_in_progress_merge_requests.md)
   - [Merge Request discussion resolution](user/discussions/index.md#moving-a-single-discussion-to-a-new-issue): Resolve discussions, move discussions in a merge request to an issue, only allow merge requests to be merged if all discussions are resolved.