8043770: File leak in MemNotifyThread::start() in hotspot.src.os.linux.vm.os_linux.cpp

Fixed by removing all code related to LowMemoryProtection, which removed offending code.

Reviewed-by: dholmes, minqi

hotspot/src/share/vm/runtime/thread.cpp

@@ -3617,9 +3617,6 @@ jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
     }
   }
 
-  // Give os specific code one last chance to start
-  os::init_3();
-
   create_vm_timer.end();
 #ifdef ASSERT
   _vm_complete = true;