python-six: Removal of python2 & 3 addon versions of six

- six is a python compatibility module to enable modules to run on
   both python2 and python3. The code from six has to be copied into
   any other module/project that is intending to use it.
- With the planned removal of python2 then neither version of this
   compatibility module is needed.
- Removal of the lfs and rootfiles. Although python-six is an addon
   its rootfile was installed into the common folder rather than the
   packages folder.
- Removal of the python-six and python3-six entries in make.sh

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

config/rootfiles/common/python-six

@@ -1,9 +0,0 @@
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO/PKG-INFO
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO/SOURCES.txt
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO/dependency_links.txt
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO/not-zip-safe
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/EGG-INFO/top_level.txt
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/six.py
-#usr/lib/python2.7/site-packages/six-1.10.0-py2.7.egg/six.pyc

config/rootfiles/packages/python3-six

@@ -1,6 +0,0 @@
-#usr/lib/python3.8/site-packages/six-1.14.0-py3.8.egg-info
-#usr/lib/python3.8/site-packages/six-1.14.0-py3.8.egg-info/PKG-INFO
-#usr/lib/python3.8/site-packages/six-1.14.0-py3.8.egg-info/SOURCES.txt
-#usr/lib/python3.8/site-packages/six-1.14.0-py3.8.egg-info/dependency_links.txt
-#usr/lib/python3.8/site-packages/six-1.14.0-py3.8.egg-info/top_level.txt
-usr/lib/python3.8/site-packages/six.py