diff --git a/ed/idlpatches/DOM-Parsing.idl.patch b/ed/idlpatches/DOM-Parsing.idl.patch
deleted file mode 100644
index 33af51fcaccd..000000000000
--- a/ed/idlpatches/DOM-Parsing.idl.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-From 67770dc936630fe71771140e2e922905ffa48e01 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Philip=20J=C3=A4genstedt?= <philip@foolip.org>
-Date: Wed, 14 Apr 2021 09:07:51 +0200
-Subject: [PATCH] Fix void in DOM-Parsing.idl
-
-https://github.com/w3c/DOM-Parsing/pull/64
----
- ed/idl/DOM-Parsing.idl | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/ed/idl/DOM-Parsing.idl b/ed/idl/DOM-Parsing.idl
-index 997126292..d0d84ab69 100644
---- a/ed/idl/DOM-Parsing.idl
-+++ b/ed/idl/DOM-Parsing.idl
-@@ -18,7 +18,7 @@ ShadowRoot includes InnerHTML;
- 
- partial interface Element {
-   [CEReactions] attribute [LegacyNullToEmptyString] DOMString outerHTML;
--  [CEReactions] void insertAdjacentHTML(DOMString position, DOMString text);
-+  [CEReactions] undefined insertAdjacentHTML(DOMString position, DOMString text);
- };
- 
- partial interface Range {
--- 
-2.31.1.295.g9ea45b61b8-goog
-