Don't output /etc/issue

/etc/issue used to contain a nice ascii-art RockyLinux logo that we would output
when this script was finished, but it doesn't anymore so there is no longer any
value to outputting this file.

migrate2rocky/migrate2rocky.sh

@@ -714,7 +714,6 @@ fi
 
 printf '\n\n\n'
 if [[ $convert_to_rocky ]]; then
-    awk 'NR<=15' < /etc/issue
     printf '%s\n' "$blue" "Done, please reboot your system.$nocolor"
 fi
 logmessage