Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/FileError.dartdoc

Index: lib/html/doc/interface/FileError.dartdoc
diff --git a/lib/html/doc/interface/FileError.dartdoc b/lib/html/doc/interface/FileError.dartdoc
deleted file mode 100644
index d485171cc9b0cd76ab102787d81c09b33e95da73..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/FileError.dartdoc
+++ /dev/null
@@ -1,38 +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 FileError
-interface FileError {
-
-  static final int ABORT_ERR = 3;
-
-  static final int ENCODING_ERR = 5;
-
-  static final int INVALID_MODIFICATION_ERR = 9;
-
-  static final int INVALID_STATE_ERR = 7;
-
-  static final int NOT_FOUND_ERR = 1;
-
-  static final int NOT_READABLE_ERR = 4;
-
-  static final int NO_MODIFICATION_ALLOWED_ERR = 6;
-
-  static final int PATH_EXISTS_ERR = 12;
-
-  static final int QUOTA_EXCEEDED_ERR = 10;
-
-  static final int SECURITY_ERR = 2;
-
-  static final int SYNTAX_ERR = 8;
-
-  static final int TYPE_MISMATCH_ERR = 11;
-
-  /** @domName FileError.code */
-  final int code;
-}