diff --git a/index.json b/index.json
index 9f8e21fd..c0d09287 100644
--- a/index.json
+++ b/index.json
@@ -2506,38 +2506,6 @@
       ]
     }
   },
-  {
-    "url": "https://wicg.github.io/construct-stylesheets/",
-    "seriesComposition": "full",
-    "shortname": "construct-stylesheets",
-    "series": {
-      "shortname": "construct-stylesheets",
-      "currentSpecification": "construct-stylesheets",
-      "nightlyUrl": "https://wicg.github.io/construct-stylesheets/"
-    },
-    "organization": "W3C",
-    "groups": [
-      {
-        "name": "Web Platform Incubator Community Group",
-        "url": "https://www.w3.org/community/wicg/"
-      }
-    ],
-    "nightly": {
-      "url": "https://wicg.github.io/construct-stylesheets/",
-      "repository": "https://github.com/WICG/construct-stylesheets",
-      "sourcePath": "index.bs",
-      "filename": "index.html"
-    },
-    "title": "Constructable Stylesheet Objects",
-    "source": "spec",
-    "shortTitle": "Constructable Stylesheet Objects",
-    "tests": {
-      "repository": "https://github.com/web-platform-tests/wpt",
-      "testPaths": [
-        "css/construct-stylesheets"
-      ]
-    }
-  },
   {
     "url": "https://wicg.github.io/contact-api/spec/",
     "seriesComposition": "full",