[llvm-branch-commits] [mlir] [mlir][Transforms] Fix crash in `-remove-dead-values` on private functions (PR #169269)

[lonely eagle via llvm-branch-commits]

https://github.com/linuxlonelyeagle approved this pull request.

I also think it's good to do this.

https://github.com/llvm/llvm-project/pull/169269