Merge branch 'issue_20900_remove_ignore_columns' into 'master'

Issue 20900 remove ignore columns

See merge request !12166

app/models/issue.rb

@@ -9,11 +9,8 @@ class Issue < ActiveRecord::Base
   include Spammable
   include FasterCacheKeys
   include RelativePositioning
-  include IgnorableColumn
   include CreatedAtFilterable
 
-  ignore_column :position
-
   DueDateStruct = Struct.new(:title, :name).freeze
   NoDueDate     = DueDateStruct.new('No Due Date', '0').freeze
   AnyDueDate    = DueDateStruct.new('Any Due Date', '').freeze

app/models/merge_request.rb

@@ -7,7 +7,6 @@ class MergeRequest < ActiveRecord::Base
   include IgnorableColumn
   include CreatedAtFilterable
 
-  ignore_column :position
   ignore_column :locked_at
 
   belongs_to :target_project, class_name: "Project"