Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/WheelEvent.dartdoc

Index: lib/html/doc/interface/WheelEvent.dartdoc
diff --git a/lib/html/doc/interface/WheelEvent.dartdoc b/lib/html/doc/interface/WheelEvent.dartdoc
deleted file mode 100644
index b8bb8b27f33217712d4942d86015959127049da8..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/WheelEvent.dartdoc
+++ /dev/null
@@ -1,62 +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 WheelEvent
-interface WheelEvent extends UIEvent {
-
-  /** @domName WheelEvent.altKey */
-  final bool altKey;
-
-  /** @domName WheelEvent.clientX */
-  final int clientX;
-
-  /** @domName WheelEvent.clientY */
-  final int clientY;
-
-  /** @domName WheelEvent.ctrlKey */
-  final bool ctrlKey;
-
-  /** @domName WheelEvent.metaKey */
-  final bool metaKey;
-
-  /** @domName WheelEvent.offsetX */
-  final int offsetX;
-
-  /** @domName WheelEvent.offsetY */
-  final int offsetY;
-
-  /** @domName WheelEvent.screenX */
-  final int screenX;
-
-  /** @domName WheelEvent.screenY */
-  final int screenY;
-
-  /** @domName WheelEvent.shiftKey */
-  final bool shiftKey;
-
-  /** @domName WheelEvent.webkitDirectionInvertedFromDevice */
-  final bool webkitDirectionInvertedFromDevice;
-
-  /** @domName WheelEvent.wheelDelta */
-  final int wheelDelta;
-
-  /** @domName WheelEvent.wheelDeltaX */
-  final int wheelDeltaX;
-
-  /** @domName WheelEvent.wheelDeltaY */
-  final int wheelDeltaY;
-
-  /** @domName WheelEvent.x */
-  final int x;
-
-  /** @domName WheelEvent.y */
-  final int y;
-
-  /** @domName WheelEvent.initWebKitWheelEvent */
-  void initWebKitWheelEvent(int wheelDeltaX, int wheelDeltaY, Window view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
-}