Get rid of all the library tags.

lib/src/exception.dart

 // Copyright (c) 2014, 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.
 
-library json_rpc_2.exception;
-
 import '../error_code.dart' as error_code;
 
 /// An exception from a JSON-RPC server that can be translated into an error
 /// response.
 class RpcException implements Exception {
   /// The error code.
   ///
   /// All non-negative error codes are available for use by application
   /// developers.
   final int code;
@@ skipping 48 matching lines @@
     };
   }
 
   String toString() {
     var prefix = "JSON-RPC error $code";
     var errorName = error_code.name(code);
     if (errorName != null) prefix += " ($errorName)";
     return "$prefix: $message";
   }
 }