Remove UDPWiimote feature

It substantially complicates the code and doesn't really provide any
functionality. According to the forums, the Android app is out of date
and has been broken for quite a while.

If we want to add this back, I'd write an app that speaks a more native
Wiimote protocol, and we can hook that up to the backend quite easily.
It could even be over our NetPlay protocol!

Source/Core/InputCommon/ControllerEmu.h

@@ -30,7 +30,6 @@ enum
 	GROUP_TYPE_TILT,
 	GROUP_TYPE_CURSOR,
 	GROUP_TYPE_TRIGGERS,
-	GROUP_TYPE_UDPWII,
 	GROUP_TYPE_SLIDER,
 };