Get rid of un-needed float-specific defines around yuv support. Remove unintended support for rgb to yuv conversion. We only support yuv to rgb conversion.
EXPORTS
_ZN7TestGdi10ConstructLEP13CBitmapDeviceP9CFbsBitGcR6TDes16 @ 1 NONAME
_ZN7TestGdi4TestEv @ 2 NONAME
_ZN7TestGdi9ConstructEP13CBitmapDeviceP9CFbsBitGcR6TDes16 @ 3 NONAME
_ZN7TestGdiC1Ev @ 4 NONAME
_ZN7TestGdiC2Ev @ 5 NONAME