llvm-project

ba0cddb4 - [libc++][NFC] Remove _LIBCPP_FREESTANDING (#176907)

[libc++][NFC] Remove _LIBCPP_FREESTANDING (#176907) `_LIBCPP_FREESTANDING` isn't used and it is unclear what libc++'s strategy is going to be for implementing freestanding at the moment. Therefore, remove the macro.