Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/SVGPathSegArcRel.dartdoc

Index: lib/html/doc/interface/SVGPathSegArcRel.dartdoc
diff --git a/lib/html/doc/interface/SVGPathSegArcRel.dartdoc b/lib/html/doc/interface/SVGPathSegArcRel.dartdoc
deleted file mode 100644
index c806e73ae06ddf6185625b8c8ac1b70be18f48f8..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/SVGPathSegArcRel.dartdoc
+++ /dev/null
@@ -1,32 +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 SVGPathSegArcRel
-interface SVGPathSegArcRel extends SVGPathSeg {
-
-  /** @domName SVGPathSegArcRel.angle */
-  num angle;
-
-  /** @domName SVGPathSegArcRel.largeArcFlag */
-  bool largeArcFlag;
-
-  /** @domName SVGPathSegArcRel.r1 */
-  num r1;
-
-  /** @domName SVGPathSegArcRel.r2 */
-  num r2;
-
-  /** @domName SVGPathSegArcRel.sweepFlag */
-  bool sweepFlag;
-
-  /** @domName SVGPathSegArcRel.x */
-  num x;
-
-  /** @domName SVGPathSegArcRel.y */
-  num y;
-}