Revert "Add redirects to /workflow docs"

This reverts commit baf0140e38c46f9dc4490e5445b062f4bddc7240

doc/articles/how_to_configure_ldap_gitlab_ee/index.md

+---
+redirect_to: '../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md'
+---
+
 This document was moved to [another location](../../administration/auth/how_to_configure_ldap_gitlab_ee/index.md).

doc/workflow/ff_merge.md

+---
+redirect_to: '../user/project/merge_requests/fast_forward_merge.md'
+---
+
 This document was moved to [user/project/merge_requests/fast_forward_merge](../user/project/merge_requests/fast_forward_merge.md).

doc/workflow/git_lfs.md

+---
+redirect_to: 'lfs/manage_large_binaries_with_git_lfs.md'
+---
+
 This document was moved to [another location](lfs/manage_large_binaries_with_git_lfs.md).

doc/workflow/merge_request_approvals.md

+---
+redirect_to: '../user/project/merge_requests/merge_request_approvals.md'
+---
+
 This document was moved to [user/project/merge_requests/merge_request_approvals](../user/project/merge_requests/merge_request_approvals.md).

doc/workflow/rebase_before_merge.md

+---
+redirect_to: '../user/project/merge_requests/fast_forward_merge.md'
+---
+
 This document was moved to [another location](../user/project/merge_requests/fast_forward_merge.md).