Revert "xshared: Print protocol numbers if --numeric was given"

Revert "xshared: Print protocol numbers if --numeric was given"

This reverts commit da8ecc62dd765b15df84c3aa6b83dcb7a81d4ffa.

The patch's original intention is not entirely clear anymore. If it was
to reduce delays involved by calling getprotobynumber() though, commit
b6196c7504d4d ("xshared: Prefer xtables_chain_protos lookup over
getprotoent") avoids those if --numeric flag was given already. Also,
this numeric protocol output did not cover iptables-save which is a more
relevant candidate for such optimizations anyway.

Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1729
Signed-off-by: Phil Sutter <phil@nwl.cc>