Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/SpeechRecognitionEvent.dartdoc

Index: lib/html/doc/interface/SpeechRecognitionEvent.dartdoc
diff --git a/lib/html/doc/interface/SpeechRecognitionEvent.dartdoc b/lib/html/doc/interface/SpeechRecognitionEvent.dartdoc
deleted file mode 100644
index 0c52398dd74653c97c84d2679cdbc1786d19d256..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/SpeechRecognitionEvent.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 SpeechRecognitionEvent
-interface SpeechRecognitionEvent extends Event {
-
-  /** @domName SpeechRecognitionEvent.error */
-  final SpeechRecognitionError error;
-
-  /** @domName SpeechRecognitionEvent.result */
-  final SpeechRecognitionResult result;
-
-  /** @domName SpeechRecognitionEvent.resultHistory */
-  final SpeechRecognitionResultList resultHistory;
-
-  /** @domName SpeechRecognitionEvent.resultIndex */
-  final int resultIndex;
-}