Fix developer shell build on Windows

src/d8.cc

Index: src/d8.cc
===================================================================
--- src/d8.cc	(revision 1647)
+++ src/d8.cc	(working copy)
@@ -163,28 +163,6 @@
 }
 
 
-Handle<Value> Shell::SetEnvironment(const Arguments& args) {
-  if (args.Length() != 2) {
-    const char* message = "setenv() takes two arguments";
-    return ThrowException(String::New(message));
-  }
-  String::Utf8Value var(args[0]);
-  String::Utf8Value value(args[1]);
-  if (*var == NULL) {
-    const char* message =
-        "os.setenv(): String conversion of variable name failed.";
-    return ThrowException(String::New(message));
-  }
-  if (*value == NULL) {
-    const char* message =
-        "os.setenv(): String conversion of variable contents failed.";
-    return ThrowException(String::New(message));
-  }
-  setenv(*var, *value, 1);
-  return v8::Undefined();
-}
-
-
 Handle<Value> Shell::Load(const Arguments& args) {
   for (int i = 0; i < args.Length(); i++) {
     HandleScope handle_scope;