Revert "Better error-message when bind fails."

runtime/bin/socket_unsupported.cc

 // Copyright (c) 2016, 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.
 
 #if defined(DART_IO_DISABLED)
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "include/dart_api.h"
 
@@ skipping 17 matching lines @@
       "Sockets unsupported on this platform"));
 }
 
 
 void FUNCTION_NAME(Socket_CreateBindConnect)(Dart_NativeArguments args) {
   Dart_ThrowException(DartUtils::NewDartArgumentError(
       "Sockets unsupported on this platform"));
 }
 
 
-void FUNCTION_NAME(Socket_IsBindError)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewDartArgumentError(
-      "Sockets unsupported on this platform"));
-}
-
-
 void FUNCTION_NAME(Socket_CreateBindDatagram)(Dart_NativeArguments args) {
   Dart_ThrowException(DartUtils::NewDartArgumentError(
       "Sockets unsupported on this platform"));
 }
 
 
 void FUNCTION_NAME(Socket_Available)(Dart_NativeArguments args) {
   Dart_ThrowException(DartUtils::NewDartArgumentError(
       "Sockets unsupported on this platform"));
 }
@@ skipping 97 matching lines @@
 
 void FUNCTION_NAME(Socket_LeaveMulticast)(Dart_NativeArguments args) {
   Dart_ThrowException(DartUtils::NewDartArgumentError(
       "Sockets unsupported on this platform"));
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(DART_IO_DISABLED)