[clang-tools-extra] [clang-tidy][NFC] Enable 'readability-simplify-boolean-expr' check (PR #158706)

[Davide Cunial via cfe-commits]

capitan-davide wrote:

> Looking at it again, I think we can't enable this check for now in the codebase because of patterns described in #164896.

Ok, should we merge some of the transformations or do we just close this PR?



https://github.com/llvm/llvm-project/pull/158706