python-distutils-extra: Removal of this python2 module

python-distutils-extra: Removal of this python2 module

- python-distutils-extra is linked to python-distutils which is no longer
   used as it has been replaced by setuptools.
- python-distutils-extra is currently from 2011 and the latest version
   is from 2016. No development occurring on this.
- No problem on a clean build with this module being removed.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>