rpm: don't list /sbin/zgenhostid twice in %files

The location of zgenhostid was changed in 0ae733c (Install zgenhostid
to sbindir, 2021-01-21).  We include all files within sbindir two lines
earlier, which causes rpmbuild to report:

    File listed twice: /sbin/zgenhostid

Drop the redundant entry from the %files section.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Closes openzfs#17601

Author: tmzullinger

rpm/generic/zfs.spec.in

@@ -506,7 +506,6 @@ systemctl --system daemon-reload >/dev/null || true
 # Core utilities
 %{_sbindir}/*
 %{_bindir}/raidz_test
-%{_sbindir}/zgenhostid
 %{_bindir}/zvol_wait
 # Optional Python 3 scripts
 %{_bindir}/arc_summary