diff --git a/ed/idlpatches/webidl.idl.patch b/ed/idlpatches/webidl.idl.patch
deleted file mode 100644
index 35e6ce40cbf0..000000000000
--- a/ed/idlpatches/webidl.idl.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From 1921eecacab1bada0c3fe0bf35c36f40bb8d6185 Mon Sep 17 00:00:00 2001
-From: Dominique Hazael-Massieux <dom@w3.org>
-Date: Fri, 22 Oct 2021 09:41:45 +0200
-Subject: [PATCH] Reinstate DOMTimeStamp
-
-Still needed in cookiestore and webrtc
-https://github.com/WICG/cookie-store/issues/205
-https://github.com/w3c/webrtc-pc/issues/2674
----
- ed/idl/webidl.idl | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/ed/idl/webidl.idl b/ed/idl/webidl.idl
-index 2fb5af470..43748c5ac 100644
---- a/ed/idl/webidl.idl
-+++ b/ed/idl/webidl.idl
-@@ -46,3 +46,5 @@ interface DOMException { // but see below note about ECMAScript binding
- 
- callback Function = any (any... arguments);
- callback VoidFunction = undefined ();
-+
-+typedef unsigned long long DOMTimeStamp;
--- 
-2.33.1
-