revert 2

Author: nsajko

src/KernelAbstractions.jl

@@ -510,15 +510,6 @@ Get a [`Backend`](@ref) instance suitable for array `A`.
 """
 function get_backend end
 
-function get_backend_recur(f::F, x) where {F}
-    t() = throw(ArgumentError("throwing to prevent a stack overflow, possibly a `get_backend` method is missing?"))
-    y = f(x)
-    if y isa typeof(x)
-        @noinline t()
-    end
-    return get_backend(y)
-end
-
 # Should cover SubArray, ReshapedArray, ReinterpretArray, Hermitian, AbstractTriangular, etc.:
 function get_backend(A::AbstractArray)
     P = parent(A)