Now that the build systems that use pip_install_wheel are all building
their wheel into a directory that we knew was empty before, we can just
install *.whl and not need to know the precise names.
By design a pyproject.toml will always build a single wheel, so there
shouldn't be any way for this to end up installing more than expected.
This obsoletes PIP_INSTALL_PACKAGE and PYPA_WHEEL, neither of which are
needed anymore.
Signed-off-by: Ross Burton <ross.burton@arm.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
