diff --git a/ed/csspatches/av1-avif.json.patch b/ed/csspatches/av1-avif.json.patch
deleted file mode 100644
index feefac7e654e..000000000000
--- a/ed/csspatches/av1-avif.json.patch
+++ /dev/null
@@ -1,76 +0,0 @@
-From 7a408601452461f2fb13a7bf85b66404af32fd2f Mon Sep 17 00:00:00 2001
-From: Francois Daoust <fd@tidoust.net>
-Date: Tue, 30 Jan 2024 09:30:54 +0100
-Subject: [PATCH] Drop incorrect av1-avif CSS extract
-
-Spec does not define CSS terms.
-
-Pending https://github.com/AOMediaCodec/av1-avif/issues/218
----
- ed/css/av1-avif.json | 55 --------------------------------------------
- 1 file changed, 55 deletions(-)
- delete mode 100644 ed/css/av1-avif.json
-
-diff --git a/ed/css/av1-avif.json b/ed/css/av1-avif.json
-deleted file mode 100644
-index b3f1c884a..000000000
---- a/ed/css/av1-avif.json
-+++ /dev/null
-@@ -1,55 +0,0 @@
--{
--  "spec": {
--    "title": "AV1 Image File Format (AVIF)",
--    "url": "https://aomediacodec.github.io/av1-avif/"
--  },
--  "properties": [],
--  "atrules": [],
--  "selectors": [],
--  "values": [],
--  "warnings": [
--    {
--      "msg": "Dangling value",
--      "name": "av01",
--      "prose": "When an item is of type av01, it is called an AV1 Image Item, and shall obey the following constraints:",
--      "href": "https://aomediacodec.github.io/av1-avif/#valdef-av1-image-item-type-av01",
--      "type": "value",
--      "value": "av01",
--      "for": "AV1 Image Item Type"
--    },
--    {
--      "msg": "Dangling value",
--      "name": "av1C",
--      "href": "https://aomediacodec.github.io/av1-avif/#valdef-av1-item-configuration-property-av1c",
--      "type": "value",
--      "value": "av1C",
--      "for": "AV1 Item Configuration Property"
--    },
--    {
--      "msg": "Dangling value",
--      "name": "a1lx",
--      "href": "https://aomediacodec.github.io/av1-avif/#valdef-av1layeredimageindexingproperty-a1lx",
--      "type": "value",
--      "value": "a1lx",
--      "for": "AV1LayeredImageIndexingProperty"
--    },
--    {
--      "msg": "Dangling value",
--      "name": "MA1B",
--      "prose": "This section defines the MIAF AV1 Baseline profile of [HEIF], specifically for [AV1] bitstreams, based on the constraints specified in [MIAF] and identified by the brand MA1B.",
--      "href": "https://aomediacodec.github.io/av1-avif/#valdef-av1-image-item-type-ma1b",
--      "type": "value",
--      "value": "MA1B",
--      "for": "AV1 Image Item Type"
--    },
--    {
--      "msg": "Dangling value",
--      "name": "MA1A",
--      "prose": "This section defines the MIAF AV1 Advanced profile of [HEIF], specifically for [AV1] bitstreams, based on the constraints specified in [MIAF] and identified by the brand MA1A.",
--      "href": "https://aomediacodec.github.io/av1-avif/#valdef-av1-image-item-type-ma1a",
--      "type": "value",
--      "value": "MA1A",
--      "for": "AV1 Image Item Type"
--    }
--  ]
--}
--- 
-2.42.0.windows.2