fix: RNGType arguments

Author: william-murray1204

stable_diffusion_cpp/stable_diffusion_cpp.py

@@ -158,7 +158,6 @@ def byref(obj: CtypesCData, offset: Optional[int] = None) -> CtypesRef[CtypesCDa
 class RNGType(IntEnum):
     STD_DEFAULT_RNG = 0
     CUDA_RNG = 1
-    RNG_TYPE_COUNT = 2
     CPU_RNG = 2
     RNG_TYPE_COUNT = 3