[clang] clang: Fix hipstdpar test relying on default target (PR #111975)

[Matt Arsenault via cfe-commits]

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@@ -1,21 +1,17 @@
-// REQUIRES: x86-registered-target
-// REQUIRES: amdgpu-registered-target
-// REQUIRES: system-linux
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arsenm wrote:

This is a pile of workarounds, there's no reason any of these tests should be host dependent 

https://github.com/llvm/llvm-project/pull/111975