make.sh: Removal of three python2 modules

make.sh: Removal of three python2 modules

- Removal of python-distutils and python-distutils-extra as these have
   been replaced by setuptools.
- Removal of python-optional-src
- Only python-distutils-extra line is removed from make.sh as
   python-distutils and python-optional-src were not in make.sh
   These two modules have not been getting built historically

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