Revert "Better error-message when bind fails."

runtime/bin/socket.cc

Index: runtime/bin/socket.cc
diff --git a/runtime/bin/socket.cc b/runtime/bin/socket.cc
index ed4db7a37e8f20ba81de00bfe739d050d7fd099b..7b6f95ae27bbc77e241081786653580c97eae202 100644
--- a/runtime/bin/socket.cc
+++ b/runtime/bin/socket.cc
@@ -234,12 +234,6 @@ void FUNCTION_NAME(Socket_CreateBindConnect)(Dart_NativeArguments args) {
   }
 }
 
-void FUNCTION_NAME(Socket_IsBindError)(Dart_NativeArguments args) {
-  intptr_t error_number =
-      DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 0));
-  bool is_bind_error = Socket::IsBindError(error_number);
-  Dart_SetReturnValue(args, is_bind_error ? Dart_True() : Dart_False());
-}
 
 void FUNCTION_NAME(Socket_CreateBindDatagram)(Dart_NativeArguments args) {
   RawAddr addr;