Remove duplicate 11.10.6 changelog entry

CHANGELOG.md

@@ -221,24 +221,6 @@ entry.
 
 - Fix input group height.
 
-
-## 11.10.6 (2019-06-04)
-
-### Fixed (7 changes, 1 of them is from the community)
-
-- Allow a member to have an access level equal to parent group. !27913
-- Fix uploading of LFS tracked file through UI. !28052
-- Use 3-way merge for squashing commits. !28078
-- Use a path for the related merge requests endpoint. !28171
-- Fix project visibility level validation. !28305 (Peter Marko)
-- Fix Rugged get_tree_entries recursive flag not working. !28494
-- Use source ref in pipeline webhook. !28772
-
-### Other (1 change)
-
-- Fix input group height.
-
-
 ## 11.10.4 (2019-05-01)
 
 ### Fixed (12 changes)