diff --git a/api/MediaRecorder.json b/api/MediaRecorder.json
index e1b7c0f7fdbc93..d752d57615292d 100644
--- a/api/MediaRecorder.json
+++ b/api/MediaRecorder.json
@@ -807,43 +807,6 @@
             "deprecated": false
           }
         }
-      },
-      "warning_event": {
-        "__compat": {
-          "description": "<code>warning</code> event",
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MediaRecorder/warning_event",
-          "support": {
-            "chrome": {
-              "version_added": "49"
-            },
-            "chrome_android": "mirror",
-            "edge": "mirror",
-            "firefox": {
-              "version_added": "25",
-              "version_removed": "71"
-            },
-            "firefox_android": {
-              "version_added": "25"
-            },
-            "ie": {
-              "version_added": false
-            },
-            "oculus": "mirror",
-            "opera": "mirror",
-            "opera_android": "mirror",
-            "safari": {
-              "version_added": false
-            },
-            "safari_ios": "mirror",
-            "samsunginternet_android": "mirror",
-            "webview_android": "mirror"
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": false,
-            "deprecated": true
-          }
-        }
       }
     }
   }