diff --git a/db_patches/patch-notification-pk.sql b/db_patches/patch-notification-pk.sql
deleted file mode 100644
index 9072d1f34..000000000
--- a/db_patches/patch-notification-pk.sql
+++ /dev/null
@@ -1,3 +0,0 @@
-DROP INDEX /*i*/user_event ON /*_*/echo_notification;
-
-ALTER TABLE /*_*/echo_notification ADD PRIMARY KEY (notification_user, notification_event);
diff --git a/includes/Hooks.php b/includes/Hooks.php
index 46c9a6e3f..a110853d7 100644
--- a/includes/Hooks.php
+++ b/includes/Hooks.php
@@ -218,10 +218,6 @@ class Hooks implements RecentChange_saveHook {
 
 		$updater->addExtensionTable( 'echo_event', "$dir/echo.sql" );
 
-		// 1.29
-		$updater->dropExtensionIndex( 'echo_notification', 'user_event',
-			"$dir/db_patches/patch-notification-pk.sql" );
-
 		// 1.33
 		// Can't use addPostDatabaseUpdateMaintenance() here because that would
 		// run the migration script after dropping the fields