Merge pull request #2167 from FluxML/bc/rm-array-cuarray-piracy

Remove piratical array conversion rule

Author: ToucheSir

src/functor.jl

@@ -121,11 +121,6 @@ adapt_storage(to::FluxCPUAdaptor, x::AbstractSparseArray) = x
 adapt_storage(to::FluxCPUAdaptor, x::CUDA.RNG) = Random.default_rng()
 adapt_storage(to::FluxCPUAdaptor, x::AbstractRNG) = x
 
-# PIRACY, should be defined in CUDA.jl
-function ChainRulesCore.rrule(::Type{Array}, x::CUDA.CuArray)
-  Array(x), dx -> (NoTangent(), CUDA.cu(unthunk(dx)))
-end
-
 function ChainRulesCore.rrule(::typeof(Adapt.adapt_storage), to::FluxCPUAdaptor, x::CUDA.AbstractGPUArray)
   adapt_storage(to, x), dx -> (NoTangent(), NoTangent(), adapt_storage(FluxCUDAAdaptor(), unthunk(dx)))
 end