4407a02 tests: Drop checks for iptables RPM

Authored and Committed by psutter 8 months ago
    tests: Drop checks for iptables RPM
    
    On one hand, the test will fail as the RPM is called 'iptables-nft' (or
    'iptables-legacy', but that's not the default). On the other, if
    iptables RPM is missing the commands will fail as well so this check
    happens implicitly anyway.