diff --git a/ed/idlpatches/css-view-transitions-2.idl.patch b/ed/idlpatches/css-view-transitions-2.idl.patch
deleted file mode 100644
index 4ffc6ba046f4..000000000000
--- a/ed/idlpatches/css-view-transitions-2.idl.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-From 4df066accf11c29efad58c7bc4c5fde6d94d909a Mon Sep 17 00:00:00 2001
-From: Francois Daoust <fd@tidoust.net>
-Date: Tue, 7 Nov 2023 11:28:57 +0100
-Subject: [PATCH] Add default value for startViewTransition argument
-
-Pending https://github.com/w3c/csswg-drafts/pull/9497
-
-(The "must have a default value" rule may be a bit too strict for such a union,
-but the default value does not introduce a substantive change in any case)
----
- ed/idl/css-view-transitions-2.idl | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/ed/idl/css-view-transitions-2.idl b/ed/idl/css-view-transitions-2.idl
-index 3c34d67ce..f133ae3e9 100644
---- a/ed/idl/css-view-transitions-2.idl
-+++ b/ed/idl/css-view-transitions-2.idl
-@@ -15,7 +15,7 @@ dictionary StartViewTransitionOptions {
- 
- partial interface Document {
- 
--  ViewTransition startViewTransition(optional (UpdateCallback or StartViewTransitionOptions) callbackOptions);
-+  ViewTransition startViewTransition(optional (UpdateCallback or StartViewTransitionOptions) callbackOptions = {});
- };
- 
- partial interface CSSRule {
--- 
-2.37.1.windows.1
-