[llvm-branch-commits] [AArch64] Remove usage of PostRAScheduler (PR #92871)

[Pengcheng Wang via llvm-branch-commits]

wangpc-pp wrote:

> Submit your PRs to `main` branch

I used [spr](https://getcord.github.io/spr/) to create this PR, so I think it's OK.

https://github.com/llvm/llvm-project/pull/92871