Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/Animation.dartdoc

Index: lib/html/doc/interface/Animation.dartdoc
diff --git a/lib/html/doc/interface/Animation.dartdoc b/lib/html/doc/interface/Animation.dartdoc
deleted file mode 100644
index f81add3ce83a74bd001b140a652dc7c179299d0c..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/Animation.dartdoc
+++ /dev/null
@@ -1,56 +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 WebKitAnimation
-interface Animation {
-
-  static final int DIRECTION_ALTERNATE = 1;
-
-  static final int DIRECTION_NORMAL = 0;
-
-  static final int FILL_BACKWARDS = 1;
-
-  static final int FILL_BOTH = 3;
-
-  static final int FILL_FORWARDS = 2;
-
-  static final int FILL_NONE = 0;
-
-  /** @domName WebKitAnimation.delay */
-  final num delay;
-
-  /** @domName WebKitAnimation.direction */
-  final int direction;
-
-  /** @domName WebKitAnimation.duration */
-  final num duration;
-
-  /** @domName WebKitAnimation.elapsedTime */
-  num elapsedTime;
-
-  /** @domName WebKitAnimation.ended */
-  final bool ended;
-
-  /** @domName WebKitAnimation.fillMode */
-  final int fillMode;
-
-  /** @domName WebKitAnimation.iterationCount */
-  final int iterationCount;
-
-  /** @domName WebKitAnimation.name */
-  final String name;
-
-  /** @domName WebKitAnimation.paused */
-  final bool paused;
-
-  /** @domName WebKitAnimation.pause */
-  void pause();
-
-  /** @domName WebKitAnimation.play */
-  void play();
-}