Stop overdubbing CUDA math functions

Author: ali-ramadhan

lib/CUDAKernels/src/CUDAKernels.jl

@@ -282,37 +282,6 @@ KernelAbstractions.generate_overdubs(@__MODULE__, CUDACtx)
 # CUDA specific method rewrites
 ###
 
-@inline Cassette.overdub(::CUDACtx, ::typeof(^), x::Float64, y::Float64) = CUDA.pow(x, y)
-@inline Cassette.overdub(::CUDACtx, ::typeof(^), x::Float32, y::Float32) = CUDA.pow(x, y)
-@inline Cassette.overdub(::CUDACtx, ::typeof(^), x::Float64, y::Int32)   = CUDA.pow(x, y)
-@inline Cassette.overdub(::CUDACtx, ::typeof(^), x::Float32, y::Int32)   = CUDA.pow(x, y)
-@inline Cassette.overdub(::CUDACtx, ::typeof(^), x::Union{Float32, Float64}, y::Int64) = CUDA.pow(x, y)
-
-# libdevice.jl
-const cudafuns = (:cos, :cospi, :sin, :sinpi, :tan,
-          :acos, :asin, :atan,
-          :cosh, :sinh, :tanh,
-          :acosh, :asinh, :atanh,
-          :log, :log10, :log1p, :log2,
-          :exp, :exp2, :exp10, :expm1, :ldexp,
-          # :isfinite, :isinf, :isnan, :signbit,
-          :abs,
-          :sqrt, :cbrt,
-          :ceil, :floor,)
-for f in cudafuns
-    @eval function Cassette.overdub(ctx::CUDACtx, ::typeof(Base.$f), x::Union{Float32, Float64})
-        @Base._inline_meta
-        return CUDA.$f(x)
-    end
-end
-
-@inline Cassette.overdub(::CUDACtx, ::typeof(sincos), x::Union{Float32, Float64}) = (CUDA.sin(x), CUDA.cos(x))
-@inline Cassette.overdub(::CUDACtx, ::typeof(exp), x::Union{ComplexF32, ComplexF64}) = CUDA.exp(x)
-
-@inline Cassette.overdub(::CUDACtx, ::typeof(SpecialFunctions.gamma), x::Union{Float32, Float64}) = CUDA.tgamma(x)
-@inline Cassette.overdub(::CUDACtx, ::typeof(SpecialFunctions.erf), x::Union{Float32, Float64}) = CUDA.erf(x)
-@inline Cassette.overdub(::CUDACtx, ::typeof(SpecialFunctions.erfc), x::Union{Float32, Float64}) = CUDA.erfc(x)
-
 @static if Base.isbindingresolved(CUDA, :emit_shmem) && Base.isdefined(CUDA, :emit_shmem)
     const emit_shmem = CUDA.emit_shmem
 else