1 files changed, 0 insertions, 56 deletions
diff --git a/lib/gitlab/background_migration/cleanup_concurrent_schema_change.rb b/lib/gitlab/background_migration/cleanup_concurrent_schema_change.rb
deleted file mode 100644
index 91b50c1a493..00000000000
--- a/lib/gitlab/background_migration/cleanup_concurrent_schema_change.rb
+++ /dev/null
@@ -1,56 +0,0 @@
-# frozen_string_literal: true
-
-module Gitlab
-  module BackgroundMigration
-    # Base class for background migration for rename/type changes.
-    class CleanupConcurrentSchemaChange
-      include Database::MigrationHelpers
-
-      # table - The name of the table the migration is performed for.
-      # old_column - The name of the old (to drop) column.
-      # new_column - The name of the new column.
-      def perform(table, old_column, new_column)
-        return unless column_exists?(table, new_column) && column_exists?(table, old_column)
-
-        rows_to_migrate = define_model_for(table)
-          .where(new_column => nil)
-          .where
-          .not(old_column => nil)
-
-        if rows_to_migrate.any?
-          BackgroundMigrationWorker.perform_in(
-            RESCHEDULE_DELAY,
-            self.class.name,
-            [table, old_column, new_column]
-          )
-        else
-          cleanup_concurrent_schema_change(table, old_column, new_column)
-        end
-      end
-
-      def cleanup_concurrent_schema_change(_table, _old_column, _new_column)
-        raise NotImplementedError
-      end
-
-      # These methods are necessary so we can re-use the migration helpers in
-      # this class.
-      def connection
-        ActiveRecord::Base.connection
-      end
-
-      def method_missing(name, *args, &block)
-        connection.__send__(name, *args, &block) # rubocop: disable GitlabSecurity/PublicSend
-      end
-
-      def respond_to_missing?(*args)
-        connection.respond_to?(*args) || super
-      end
-
-      def define_model_for(table)
-        Class.new(ActiveRecord::Base) do
-          self.table_name = table
-        end
-      end
-    end
-  end
-end