Use migration level lock-retries

doc/development/cascading_settings.md

@@ -41,6 +41,8 @@ Settings are not cascading by default. To define a cascading setting, take the f
     class AddDelayedProjectRemovalCascadingSetting < Gitlab::Database::Migration[1.0]
       include Gitlab::Database::MigrationHelpers::CascadingNamespaceSettings
 
+      enable_lock_retries!
+
       def up
         add_cascading_namespace_setting :delayed_project_removal, :boolean, default: false, null: false
       end

lib/gitlab/database/migration_helpers/cascading_namespace_settings.rb

@@ -31,10 +31,8 @@ module Gitlab
 
           namespace_options = options.merge(null: true, default: nil)
 
-          with_lock_retries do
-            add_column(:namespace_settings, setting_name, type, namespace_options)
-            add_column(:namespace_settings, lock_column_name, :boolean, default: false, null: false)
-          end
+          add_column(:namespace_settings, setting_name, type, namespace_options)
+          add_column(:namespace_settings, lock_column_name, :boolean, default: false, null: false)
 
           add_column(:application_settings, setting_name, type, options)
           add_column(:application_settings, lock_column_name, :boolean, default: false, null: false)
@@ -43,10 +41,8 @@ module Gitlab
         def remove_cascading_namespace_setting(setting_name)
           lock_column_name = "lock_#{setting_name}".to_sym
 
-          with_lock_retries do
-            remove_column(:namespace_settings, setting_name) if column_exists?(:namespace_settings, setting_name)
-            remove_column(:namespace_settings, lock_column_name) if column_exists?(:namespace_settings, lock_column_name)
-          end
+          remove_column(:namespace_settings, setting_name) if column_exists?(:namespace_settings, setting_name)
+          remove_column(:namespace_settings, lock_column_name) if column_exists?(:namespace_settings, lock_column_name)
 
           remove_column(:application_settings, setting_name) if column_exists?(:application_settings, setting_name)
           remove_column(:application_settings, lock_column_name) if column_exists?(:application_settings, lock_column_name)