diff --git a/ed/css/css-highlight-api.json b/ed/css/css-highlight-api.json
deleted file mode 100644
index 7dacca7ee762..000000000000
--- a/ed/css/css-highlight-api.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "spec": {
-    "title": "CSS Custom Highlight API Module Level 1",
-    "url": "https://drafts.csswg.org/css-highlight-api-1/"
-  },
-  "properties": [],
-  "atrules": [],
-  "selectors": [
-    {
-      "name": "::highlight()",
-      "value": "::highlight(<custom-highlight-name>)",
-      "href": "https://drafts.csswg.org/css-highlight-api-1/#selectordef-highlight-custom-highlight-name"
-    }
-  ],
-  "values": [
-    {
-      "name": "<custom-highlight-name>",
-      "prose": "The ::highlight(<custom-highlight-name>) pseudo-element (also known as the custom highlight pseudo-element) represents the portion of a document that is being contained or partially contained in all the ranges of the registered custom highlight with the custom highlight name <custom-highlight-name>, if any. <custom-highlight-name> must be a valid CSS <ident-token>.",
-      "href": "https://drafts.csswg.org/css-highlight-api-1/#typedef-custom-highlight-name",
-      "type": "type"
-    }
-  ]
-}