📦Drop deprecated bdist_wheel.universal option

This patch stops using said setting in the `setup.cfg` file. It has
been marked as deprecated and would make `wheel` produce `py2.py3`-
tagged binary distributions in the past. It was never used in this
project for that purpose and so the deletion has no effect on the
resulting file names or metadata.

Ref: pypa/setuptools#4939

Author: webknjaz

setup.cfg

@@ -1,8 +1,3 @@
-[bdist_wheel]
-# wheels should be OS-specific:
-# their names must contain macOS/manulinux1/2010/2014/Windows identifiers
-universal = 0
-
 [metadata]
 name = ansible-pylibssh
 url = https://github.com/ansible/pylibssh