Revert "component/firewalld: Enforce slapos python for gobject-introspection"

This reverts commit 054386d6.

It proven to be insufficient to fix issues with PYTHON make variable
surcharging from top make.

component/firewalld/buildout.cfg

@@ -69,7 +69,6 @@ url = http://ftp.gnome.org/pub/gnome/core/3.22/3.22.2/sources/gobject-introspect
 md5sum = 5af8d724f25d0c9cfbe6df41b77e5dc0
 configure-options =
   --disable-static
-  --with-python=${buildout:executable}
 
 environment =
   PATH=${pkgconfig:location}/bin:${gettext:location}/bin:${glib:location}/bin:${xz-utils:location}/bin:${flex:location}/bin:${bison:location}/bin:%(PATH)s