[clang] [clang-tools-extra] [clang-tidy] Refactor `modernize-redundant-void-arg` (PR #173340)

[Richard Thomson via cfe-commits]

LegalizeAdulthood wrote:

Thanks for this improvement!  This was the very first check that I wrote for clang-tidy `:)`

https://github.com/llvm/llvm-project/pull/173340