The release tarball already contains a pre-generated _version.py with
the version hardcoded, so versioneer is not needed at build time.
Patch pyproject.toml to only require setuptools and remove
PKG_BUILD_DEPENDS:=python-versioneer/host.
Remove python-versioneer package as it is no longer needed.
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>