Cleanup the kernel service implementation and avoid printing on the console when no tracing flags a…

runtime/bin/main.cc

Index: runtime/bin/main.cc
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index 5a89f4d4ddc0c321b2e599d78d2886b133d09e75..28804f4a1b6deccf32c39e52e95fbbe3a5cd4882 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -910,7 +910,6 @@ static Dart_Isolate CreateIsolateAndSetupHelper(const char* script_uri,
   CHECK_RESULT(result);
 
   if (!Dart_IsKernelIsolate(isolate) && use_dart_frontend) {
-    Log::PrintErr("Waiting for Kernel isolate to load.\n");
     // This must be the main script to be loaded. Wait for Kernel isolate
     // to finish initialization.
     Dart_Port port = Dart_ServiceWaitForKernelPort();