The host build replaces the use of the host pip requirements file. This
also updates the dependants of setuptools-scm to depend on the host
build.
This also removes the toml host pip requirements file as toml is not
used by any other package.
Signed-off-by: Jeffery To <jeffery.to@gmail.com>
This also removes PKG_BUILD_PARALLEL:=0 that was added for packages that
use HOST_PYTHON3_PACKAGE_BUILD_DEPENDS.
Signed-off-by: Jeffery To <jeffery.to@gmail.com>
