[clang] [clang-format] Remove obsolete code (PR #220080)

[Björn Schäpers via cfe-commits]

HazardyKnusperkeks wrote:

> Also, it would obsolete #212856, which caused the regression in #222132.

The regression #222132 would be fixed with #226587, and that does not directly touch the star amp logic, but makes sure we parse e.g. the lambda the same, whether it is a top level lambda or inside a function, that is in my view a good thing, instead of just annotating it correctly by accident.

https://github.com/llvm/llvm-project/pull/220080