Removed duplicate variable definitions in socket_unsupport and socket_base_unsupported.

runtime/bin/socket_unsupported.cc

Index: runtime/bin/socket_unsupported.cc
diff --git a/runtime/bin/socket_unsupported.cc b/runtime/bin/socket_unsupported.cc
index a1e08b7b7c550f9176b594bc58e2e4134942bc95..1641bcfe5a8b6dfc77fe0ca83b468a9cfc3852c8 100644
--- a/runtime/bin/socket_unsupported.cc
+++ b/runtime/bin/socket_unsupported.cc
@@ -11,11 +11,6 @@
 namespace dart {
 namespace bin {
 
-bool short_socket_read = false;
-
-bool short_socket_write = false;
-
-
 void FUNCTION_NAME(Socket_CreateConnect)(Dart_NativeArguments args) {
   Dart_ThrowException(
       DartUtils::NewDartArgumentError("Sockets unsupported on this platform"));