[clang-tools-extra] [llvm] [clang-tidy][NFC] Remove the `ObjCModuleTest.cpp` unit test (PR #185832)

[Baranov Victor via llvm-commits]

vbvictor wrote:

Added hokein as author of these files, looks good to me but I'd really want to hear from author if he is okay with this removal (maybe we are missing something)

https://github.com/llvm/llvm-project/pull/185832