[llvm] [MemProf] Drop unneccessary REQUIRES: x86-linux directives. (PR #142718)

[Snehasish Kumar via llvm-commits]

snehasish wrote:

### Merge activity

* **Jun 4, 3:33 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/142718).


https://github.com/llvm/llvm-project/pull/142718