Revert "Delete Groups which failed to be deleted"

This reverts commit 5824a2b0e556631425ab709af2d79f58cd184395.

CHANGELOG.md

@@ -134,37 +134,6 @@ entry.
 - Fix and improve `Sortable.highest_label_priority`. !7165
 - Fixed sticky merge request tabs when sidebar is pinned. !7167
 - Only remove right connector of first build of last stage. !7179
-  - Backups do not fail anymore when using tar on annex and custom_hooks only. !5814
-  - Cronjob to delete projects and groups which failed previously !7067
-  - Adds user project membership expired event to clarify why user was removed (Callum Dryden)
-  - Trim leading and trailing whitespace on project_path (Linus Thiel)
-  - Prevent award emoji via notes for issues/MRs authored by user (barthc)
-  - Adds an optional path parameter to the Commits API to filter commits by path (Luis HGO)
-  - Fix extra space on Build sidebar on Firefox !7060
-  - Fix mobile layout issues in admin user overview page !7087
-  - Fix HipChat notifications rendering (airatshigapov, eisnerd)
-  - Add hover to trash icon in notes !7008 (blackst0ne)
-  - Fix sidekiq stats in admin area (blackst0ne)
-  - Removed delete branch tooltip !6954
-  - Escape ref and path for relative links !6050 (winniehell)
-  - Fixed link typo on /help/ui to Alerts section. !6915 (Sam Rose)
-  - Fix filtering of milestones with quotes in title (airatshigapov)
-  - Refactor less readable existance checking code from CoffeeScript !6289 (jlogandavison)
-  - Update mail_room and enable sentinel support to Reply By Email (!7101)
-  - Simpler arguments passed to named_route on toggle_award_url helper method
-  - Fix typo in framework css class. !7086 (Daniel Voogsgerd)
-  - New issue board list dropdown stays open after adding a new list
-  - Fix: Backup restore doesn't clear cache
-  - API: Fix project deploy keys 400 and 500 errors when adding an existing key. !6784 (Joshua Welsh)
-  - Replace jquery.cookie plugin with js.cookie !7085
-  - Use MergeRequestsClosingIssues cache data on Issue#closed_by_merge_requests method
-  - Fix Sign in page 'Forgot your password?' link overlaps on medium-large screens
-  - Show full status link on MR & commit pipelines
-  - Fix documents and comments on Build API `scope`
-  - Refactor email, use setter method instead AR callbacks for email attribute (Semyon Pupkov)
-
-## 8.13.2
-  - Fix builds dropdown overlapping bug !7124
 ## 8.13.1 (2016-10-25)