1 files changed, 0 insertions, 44 deletions
diff --git a/lib/gitlab/background_migration/populate_merge_request_assignees_table.rb b/lib/gitlab/background_migration/populate_merge_request_assignees_table.rb
deleted file mode 100644
index 28cc4a5e3fa..00000000000
--- a/lib/gitlab/background_migration/populate_merge_request_assignees_table.rb
+++ /dev/null
@@ -1,44 +0,0 @@
-# frozen_string_literal: true
-
-module Gitlab
-  module BackgroundMigration
-    # This background migration creates records on merge_request_assignees according
-    # to the given merge request IDs range. A _single_ INSERT is issued for the given range.
-    # This is required for supporting multiple assignees on merge requests.
-    class PopulateMergeRequestAssigneesTable
-      def perform(from_id, to_id)
-        select_sql =
-          MergeRequest
-            .where(merge_request_assignees_not_exists_clause)
-            .where(id: from_id..to_id)
-            .where.not(assignee_id: nil)
-            .select(:id, :assignee_id)
-            .to_sql
-
-        execute("INSERT INTO merge_request_assignees (merge_request_id, user_id) #{select_sql}")
-      end
-
-      def perform_all_sync(batch_size:)
-        MergeRequest.each_batch(of: batch_size) do |batch|
-          range = batch.pluck('MIN(id)', 'MAX(id)').first
-
-          perform(*range)
-        end
-      end
-
-      private
-
-      def merge_request_assignees_not_exists_clause
-        <<~SQL
-            NOT EXISTS (SELECT 1 FROM merge_request_assignees
-                        WHERE merge_request_assignees.merge_request_id = merge_requests.id)
-        SQL
-      end
-
-      def execute(sql)
-        @connection ||= ActiveRecord::Base.connection
-        @connection.execute(sql)
-      end
-    end
-  end
-end