Fix build break

Author: mhegazy

baselines/dom.generated.d.ts

@@ -10257,7 +10257,7 @@ interface Node extends EventTarget {
      * Returns the last child.
      */
     readonly lastChild: ChildNode | null;
-    readonly namespaceURI: string | null;;
+    readonly namespaceURI: string | null;
     /**
      * Returns the next sibling.
      */

inputfiles/overridingTypes.json

@@ -538,7 +538,7 @@
                         "namespaceURI": {
                             "name":"namespaceURI",
                             "read-only": 1,
-                            "override-type": "string | null;"
+                            "override-type": "string | null"
                         }
                     }
                 }