[llvm] llvm-reduce: Remove unsupported from bitcode uselistorder test (PR #134185)

[Danila Malyutin via llvm-commits]

danilaml wrote:

I remember hitting this assert not that long ago when reducing the test case for https://github.com/llvm/llvm-project/issues/131355 . Thankfully I was able to fallback to bugpoint, but in general it was easy to trigger eat when reducing miscompile caused by non-determinism in the compiler (which lack of uselists is only a small part of). If llvm-reduce can gracefully recover from this now, then great!

https://github.com/llvm/llvm-project/pull/134185