revert network-manager change

install

@@ -286,6 +286,8 @@ cat << EOF > ${ioniceCron}
 EOF
 chmod 600 ${ioniceCron}
 
+exit 0
+
 # remove networkmanager and configure networkd
 if [ ${version} -gt 4 ]; then
   nic="$(awk '/^.*NetworkManager.*dhcp.*\(.*\)/ { print $9 }' /var/log/syslog | sort | uniq | sed 's/[^a-zA-Z0-9]//g' | tail -1)"