Remove support for attribute event listeners.

client/dom/generated/src/interface/XMLHttpRequestUpload.dart

Index: client/dom/generated/src/interface/XMLHttpRequestUpload.dart
diff --git a/client/dom/generated/src/interface/XMLHttpRequestUpload.dart b/client/dom/generated/src/interface/XMLHttpRequestUpload.dart
index 236118eeb6d1ebe1bb1402ac6db540332d69a873..a0eeed6952436d7b47d0551923269dcc2eed260a 100644
--- a/client/dom/generated/src/interface/XMLHttpRequestUpload.dart
+++ b/client/dom/generated/src/interface/XMLHttpRequestUpload.dart
@@ -6,26 +6,6 @@
 
 interface XMLHttpRequestUpload extends EventTarget {
 
-  EventListener get onabort();
-
-  void set onabort(EventListener value);
-
-  EventListener get onerror();
-
-  void set onerror(EventListener value);
-
-  EventListener get onload();
-
-  void set onload(EventListener value);
-
-  EventListener get onloadstart();
-
-  void set onloadstart(EventListener value);
-
-  EventListener get onprogress();
-
-  void set onprogress(EventListener value);
-
   void addEventListener(String type, EventListener listener, [bool useCapture]);
 
   bool dispatchEvent(Event evt);