Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/RealtimeAnalyserNode.dartdoc

-// 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 RealtimeAnalyserNode
-interface RealtimeAnalyserNode extends AudioNode {
-
-  /** @domName RealtimeAnalyserNode.fftSize */
-  int fftSize;
-
-  /** @domName RealtimeAnalyserNode.frequencyBinCount */
-  final int frequencyBinCount;
-
-  /** @domName RealtimeAnalyserNode.maxDecibels */
-  num maxDecibels;
-
-  /** @domName RealtimeAnalyserNode.minDecibels */
-  num minDecibels;
-
-  /** @domName RealtimeAnalyserNode.smoothingTimeConstant */
-  num smoothingTimeConstant;
-
-  /** @domName RealtimeAnalyserNode.getByteFrequencyData */
-  void getByteFrequencyData(Uint8Array array);
-
-  /** @domName RealtimeAnalyserNode.getByteTimeDomainData */
-  void getByteTimeDomainData(Uint8Array array);
-
-  /** @domName RealtimeAnalyserNode.getFloatFrequencyData */
-  void getFloatFrequencyData(Float32Array array);
-}