[llvm] [AMDGPU][test]added remove duplicate options for update_mc_test_check script (PR #111769)

[Alexander Richardson via llvm-commits]

https://github.com/arichardson commented:

Could you add a test for sorting with an input that contains some comments. 

Ideally those comments would remaing attached to the line they were on before.

https://github.com/llvm/llvm-project/pull/111769