diff --git a/api/UIEvent.json b/api/UIEvent.json
index bec5c43e52e57a..2be1b5bdd9130b 100644
--- a/api/UIEvent.json
+++ b/api/UIEvent.json
@@ -358,126 +358,6 @@
           }
         }
       },
-      "pageX": {
-        "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/UIEvent/pageX",
-          "support": {
-            "chrome": {
-              "version_added": "1",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageX</code> in version 45."
-            },
-            "chrome_android": {
-              "version_added": "18",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageX</code> in version 45."
-            },
-            "edge": {
-              "version_added": "12"
-            },
-            "firefox": {
-              "version_added": "1",
-              "version_removed": "69"
-            },
-            "firefox_android": {
-              "version_added": "4",
-              "version_removed": "79"
-            },
-            "ie": {
-              "version_added": "9"
-            },
-            "opera": {
-              "version_added": "15",
-              "version_removed": "31"
-            },
-            "opera_android": {
-              "version_added": "14",
-              "version_removed": "32"
-            },
-            "safari": {
-              "version_added": "≤4"
-            },
-            "safari_ios": {
-              "version_added": "≤3"
-            },
-            "samsunginternet_android": {
-              "version_added": "1.0",
-              "version_removed": "4.0",
-              "notes": "Replaced by <code>MouseEvent.pageX</code> in Samsung Internet 5.0."
-            },
-            "webview_android": {
-              "version_added": "≤37",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageX</code> in version 45."
-            }
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": false,
-            "deprecated": true
-          }
-        }
-      },
-      "pageY": {
-        "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/UIEvent/pageY",
-          "support": {
-            "chrome": {
-              "version_added": "1",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageY</code> in version 45."
-            },
-            "chrome_android": {
-              "version_added": "18",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageY</code> in version 45."
-            },
-            "edge": {
-              "version_added": "12"
-            },
-            "firefox": {
-              "version_added": "1",
-              "version_removed": "69"
-            },
-            "firefox_android": {
-              "version_added": "4",
-              "version_removed": "79"
-            },
-            "ie": {
-              "version_added": "9"
-            },
-            "opera": {
-              "version_added": "15",
-              "version_removed": "31"
-            },
-            "opera_android": {
-              "version_added": "14",
-              "version_removed": "32"
-            },
-            "safari": {
-              "version_added": "≤4"
-            },
-            "safari_ios": {
-              "version_added": "≤3"
-            },
-            "samsunginternet_android": {
-              "version_added": "1.0",
-              "version_removed": "4.0",
-              "notes": "Replaced by <code>MouseEvent.pageY</code> in Samsung Internet 5.0."
-            },
-            "webview_android": {
-              "version_added": "≤37",
-              "version_removed": "44",
-              "notes": "Replaced by <code>MouseEvent.pageY</code> in version 45."
-            }
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": false,
-            "deprecated": true
-          }
-        }
-      },
       "sourceCapabilities": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/UIEvent/sourceCapabilities",