samba.postinst: do not populate sambashare from the Ubuntu admin group
This fixes the following Ubuntu bug:
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1942195
by removing currently broken Ubuntu specific code from samba.postint.
This fixes the following Ubuntu bug:
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1942195
by removing currently broken Ubuntu specific code from samba.postint.