1 files changed, 0 insertions, 52 deletions
diff --git a/lib/gitlab/database/multi_threaded_migration.rb b/lib/gitlab/database/multi_threaded_migration.rb
deleted file mode 100644
index 65a6cb8e369..00000000000
--- a/lib/gitlab/database/multi_threaded_migration.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-# frozen_string_literal: true
-
-module Gitlab
-  module Database
-    module MultiThreadedMigration
-      MULTI_THREAD_AR_CONNECTION = :thread_local_ar_connection
-
-      # This overwrites the default connection method so that every thread can
-      # use a thread-local connection, while still supporting all of Rails'
-      # migration methods.
-      def connection
-        Thread.current[MULTI_THREAD_AR_CONNECTION] ||
-          ActiveRecord::Base.connection
-      end
-
-      # Starts a thread-pool for N threads, along with N threads each using a
-      # single connection. The provided block is yielded from inside each
-      # thread.
-      #
-      # Example:
-      #
-      #     with_multiple_threads(4) do
-      #       execute('SELECT ...')
-      #     end
-      #
-      # thread_count - The number of threads to start.
-      #
-      # join - When set to true this method will join the threads, blocking the
-      #        caller until all threads have finished running.
-      #
-      # Returns an Array containing the started threads.
-      def with_multiple_threads(thread_count, join: true)
-        pool = Gitlab::Database.create_connection_pool(thread_count)
-
-        threads = Array.new(thread_count) do
-          Thread.new do
-            pool.with_connection do |connection|
-              Thread.current[MULTI_THREAD_AR_CONNECTION] = connection
-              yield
-            ensure
-              Thread.current[MULTI_THREAD_AR_CONNECTION] = nil
-            end
-          end
-        end
-
-        threads.each(&:join) if join
-
-        threads
-      end
-    end
-  end
-end