deleted file mode 100644
--- a/dom/webidl/RecordErrorEvent.webidl
+++ /dev/null
@@ -1,16 +0,0 @@
-/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this file,
- * You can obtain one at http://mozilla.org/MPL/2.0/.
- */
-
-[Constructor(DOMString type, optional RecordErrorEventInit eventInitDict)]
-interface RecordErrorEvent : Event
-{
-  readonly attribute DOMString name;
-};
-
-dictionary RecordErrorEventInit : EventInit
-{
-  DOMString name = "";
-};

--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -1027,17 +1027,16 @@ WEBIDL_FILES += [
     'CloseEvent.webidl',
     'CustomEvent.webidl',
     'DeviceOrientationEvent.webidl',
     'HashChangeEvent.webidl',
     'PageTransitionEvent.webidl',
     'PopStateEvent.webidl',
     'PopupBlockedEvent.webidl',
     'ProgressEvent.webidl',
-    'RecordErrorEvent.webidl',
     'StyleRuleChangeEvent.webidl',
     'StyleSheetApplicableStateChangeEvent.webidl',
     'StyleSheetChangeEvent.webidl',
 ]
 
 # We only expose our prefable test interfaces in debug builds, just to be on
 # the safe side.
 if CONFIG['MOZ_DEBUG']:
@@ -1088,17 +1087,16 @@ GENERATED_EVENTS_WEBIDL_FILES = [
     'PerformanceEntryEvent.webidl',
     'PluginCrashedEvent.webidl',
     'PopStateEvent.webidl',
     'PopupBlockedEvent.webidl',
     'PresentationConnectionAvailableEvent.webidl',
     'PresentationConnectionCloseEvent.webidl',
     'ProgressEvent.webidl',
     'PromiseRejectionEvent.webidl',
-    'RecordErrorEvent.webidl',
     'ScrollViewChangeEvent.webidl',
     'StyleRuleChangeEvent.webidl',
     'StyleSheetApplicableStateChangeEvent.webidl',
     'StyleSheetChangeEvent.webidl',
     'TCPServerSocketEvent.webidl',
     'TCPSocketErrorEvent.webidl',
     'TCPSocketEvent.webidl',
     'TrackEvent.webidl',