Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/SVGAnimationElement.dartdoc

Index: lib/html/doc/interface/SVGAnimationElement.dartdoc
diff --git a/lib/html/doc/interface/SVGAnimationElement.dartdoc b/lib/html/doc/interface/SVGAnimationElement.dartdoc
deleted file mode 100644
index 28076c78daa4b9a01167613b924cf675c8aa2e39..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/SVGAnimationElement.dartdoc
+++ /dev/null
@@ -1,23 +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 SVGAnimationElement
-interface SVGAnimationElement extends SVGElement, SVGTests, SVGExternalResourcesRequired, ElementTimeControl {
-
-  /** @domName SVGAnimationElement.targetElement */
-  final SVGElement targetElement;
-
-  /** @domName SVGAnimationElement.getCurrentTime */
-  num getCurrentTime();
-
-  /** @domName SVGAnimationElement.getSimpleDuration */
-  num getSimpleDuration();
-
-  /** @domName SVGAnimationElement.getStartTime */
-  num getStartTime();
-}