DEV: Remove double query in `Group#remove_review_group`.

DEV: Remove double query in Group#remove_review_group.

Probably a mistake during commit.

diff --git a/app/models/group.rb b/app/models/group.rb
index 0988cc3..3d15993 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -57,7 +57,6 @@ class Group < ActiveRecord::Base
 
   def remove_review_groups
     Category.where(review_group_id: self.id).update_all(review_group_id: nil)
-    Category.where(review_group_id: self.id).update_all(review_group_id: nil)
   end
 
   validate :name_format_validator

GitHub sha: 2fbd4eb1