Remove dart_noopt and related parts from the VM.

runtime/lib/vmservice.cc

Index: runtime/lib/vmservice.cc
diff --git a/runtime/lib/vmservice.cc b/runtime/lib/vmservice.cc
index 5b6af4f707ce598da661873e44ac8f1b94610d15..bdd1a0a8f4c2674effbd3e22168ac2fee330b9a5 100644
--- a/runtime/lib/vmservice.cc
+++ b/runtime/lib/vmservice.cc
@@ -124,15 +124,15 @@ DEFINE_NATIVE_ENTRY(VMService_SendObjectRootServiceMessage, 1) {
 
 
 DEFINE_NATIVE_ENTRY(VMService_OnStart, 0) {
+#ifndef PRODUCT
+  if (!FLAG_support_service) {
+    return Object::null();
+  }
   if (FLAG_trace_service) {
     OS::Print("vm-service: Booting dart:vmservice library.\n");
   }
   // Boot the dart:vmservice library.
   ServiceIsolate::BootVmServiceLibrary();
-  if (!FLAG_support_service) {
-    return Object::null();
-  }
-#ifndef PRODUCT
   // Register running isolates with service.
   RegisterRunningIsolatesVisitor register_isolates(thread);
   if (FLAG_trace_service) {