[llvm] [TLI][AArch64] Remove VecFuncs mapping for functions with output pointers (PR #108967)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

Closing in favor of https://github.com/llvm/llvm-project/pull/108980 (as there's nothing actually wrong with the mappings themselves). 

https://github.com/llvm/llvm-project/pull/108967