Remove many features when building product mode

runtime/vm/exceptions.cc

Index: runtime/vm/exceptions.cc
diff --git a/runtime/vm/exceptions.cc b/runtime/vm/exceptions.cc
index 29f16848f17ccaeec0c97f737240493543103b59..67344d7584969f3a8b359a143d0a3d47c87ff9b7 100644
--- a/runtime/vm/exceptions.cc
+++ b/runtime/vm/exceptions.cc
@@ -489,11 +489,13 @@ void Exceptions::Throw(Thread* thread, const Instance& exception) {
   // Do not notify debugger on stack overflow and out of memory exceptions.
   // The VM would crash when the debugger calls back into the VM to
   // get values of variables.
+#ifndef PRODUCT
   Isolate* isolate = thread->isolate();
   if (exception.raw() != isolate->object_store()->out_of_memory() &&
       exception.raw() != isolate->object_store()->stack_overflow()) {
     isolate->debugger()->SignalExceptionThrown(exception);
   }
+#endif  // !PRODUCT
   // Null object is a valid exception object.
   ThrowExceptionHelper(thread, exception,
       Stacktrace::Handle(thread->zone()), false);