Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/HttpRequestUpload.dartdoc

Index: lib/html/doc/interface/HttpRequestUpload.dartdoc
diff --git a/lib/html/doc/interface/HttpRequestUpload.dartdoc b/lib/html/doc/interface/HttpRequestUpload.dartdoc
deleted file mode 100644
index 50165b52fa18dae6e7de355c9a281c77e56ce4a5..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/HttpRequestUpload.dartdoc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// WARNING:
-//   This file contains documentation that is merged into the real source.
-//   Do not make code changes here.
-
-/// @domName XMLHttpRequestUpload
-interface HttpRequestUpload extends EventTarget {
-
-  /**
-   * @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent
-   */
-  HttpRequestUploadEvents get on();
-
-  /** @domName XMLHttpRequestUpload.addEventListener */
-  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
-
-  /** @domName XMLHttpRequestUpload.dispatchEvent */
-  bool $dom_dispatchEvent(Event evt);
-
-  /** @domName XMLHttpRequestUpload.removeEventListener */
-  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
-}
-
-interface HttpRequestUploadEvents extends Events {
-
-  EventListenerList get abort();
-
-  EventListenerList get error();
-
-  EventListenerList get load();
-
-  EventListenerList get loadEnd();
-
-  EventListenerList get loadStart();
-
-  EventListenerList get progress();
-}