swift

9d5359d1 - [Demangling] Remove includes of swift/Basic/Assertions.h

[Demangling] Remove includes of swift/Basic/Assertions.h They are not used. Demangling uses `assert()` from <cassert>, and macros from lib/Demangling/DemanglerAssert.h. Reverts the lib/Demangling changes from #74184. No behavior change.