evdev: fix shutdown hang

Note: This probably means our approach of populating from udev isn't
safe to be called multiple times.

Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp

@@ -141,7 +141,6 @@ static void StopHotplugThread()
 void Init()
 {
   s_devnode_name_map.clear();
-  PopulateDevices();
   StartHotplugThread();
 }