Remove RPM key import

Anaconda now imports GPG keys for RPM. See:
https://github.com/rhinstaller/anaconda/pull/2855
https://github.com/rhinstaller/anaconda/blob/master/data/product.d/fedora.conf#L23

fedora-live-base.ks

@@ -302,9 +302,6 @@ EOF
 
 # work around for poor key import UI in PackageKit
 rm -f /var/lib/rpm/__db*
-releasever=$(rpm --eval '%{fedora}')
-basearch=$(uname -i)
-rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$releasever-$basearch
 echo "Packages within this LiveCD"
 rpm -qa --qf '%{size}\t%{name}-%{version}-%{release}.%{arch}\n' |sort -rn
 # Note that running rpm recreates the rpm db files which aren't needed or wanted