[llvm] [IR] Remove CreateElementUnorderedAtomicMemMove (PR #127418)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

> The CreateElementUnorderedAtomic methods probably exist for out-of-tree use (likely for Falcon JIT?)

Ah, thanks!  In that case, let's keep the function for now.


https://github.com/llvm/llvm-project/pull/127418