Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/SVGFEDropShadowElement.dartdoc

Index: lib/html/doc/interface/SVGFEDropShadowElement.dartdoc
diff --git a/lib/html/doc/interface/SVGFEDropShadowElement.dartdoc b/lib/html/doc/interface/SVGFEDropShadowElement.dartdoc
deleted file mode 100644
index a29153cf872607a48719f41e37899c9ba0fd126f..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/SVGFEDropShadowElement.dartdoc
+++ /dev/null
@@ -1,29 +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 SVGFEDropShadowElement
-interface SVGFEDropShadowElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-
-  /** @domName SVGFEDropShadowElement.dx */
-  final SVGAnimatedNumber dx;
-
-  /** @domName SVGFEDropShadowElement.dy */
-  final SVGAnimatedNumber dy;
-
-  /** @domName SVGFEDropShadowElement.in1 */
-  final SVGAnimatedString in1;
-
-  /** @domName SVGFEDropShadowElement.stdDeviationX */
-  final SVGAnimatedNumber stdDeviationX;
-
-  /** @domName SVGFEDropShadowElement.stdDeviationY */
-  final SVGAnimatedNumber stdDeviationY;
-
-  /** @domName SVGFEDropShadowElement.setStdDeviation */
-  void setStdDeviation(num stdDeviationX, num stdDeviationY);
-}