Remove python-nss, which is based on python 2.x and triggers CVE scans.
We don't use python2 in any docker containers any more, so this module,
and python 2.x itself is not required here.
TESTS
================================
Rebuild all StarlingX and OpenStack containers that inherit from
stx-debian
Story: 2011159
Task: 50404
Signed-off-by: Davlet Panech <davlet.panech@windriver.com>
Change-Id: Ifc6e6c8778b2f7438ea76adb8c4f6e08a822ce7c