[clang] [NFC] Delete unused clang-formatted-file.txt/ClangFormattedStatus.rst files (PR #109220)

[Rahul Joshi via cfe-commits]

jurahul wrote:

Thanks. I haven't seen any responses from @mydeveloperday earlier, hopefully @owenca can chime in.

https://github.com/llvm/llvm-project/pull/109220