jenkins: remove commented GNUPGHOME
jenkins: remove commented GNUPGHOME

This is a legacy setting that we can simply remove from the script.

Signed-off-by: Ken Dreyer <5e8722659ddff11a7aa48f205bfe5d35ac8f5ae5@inktank.com>

rtulke/ceph-deploy,isyippee/ceph-deploy,alfredodeza/ceph-deploy,trhoden/ceph-deploy,osynge/ceph-deploy,osynge/ceph-deploy,SUSE/ceph-deploy-to-be-deleted,imzhulei/ceph-deploy,ddiss/ceph-deploy,Vicente-Cheng/ceph-deploy,SUSE/ceph-deploy,alfredodeza/ceph-deploy,ddiss/ceph-deploy,ghxandsky/ceph-deploy,imzhulei/ceph-deploy,Vicente-Cheng/ceph-deploy,codenrhoden/ceph-deploy,SUSE/ceph-deploy-to-be-deleted,ktdreyer/ceph-deploy,ktdreyer/ceph-deploy,shenhequnying/ceph-deploy,rtulke/ceph-deploy,jumpstarter-io/ceph-deploy,branto1/ceph-deploy,zhouyuan/ceph-deploy,branto1/ceph-deploy,ceph/ceph-deploy,jumpstarter-io/ceph-deploy,isyippee/ceph-deploy,codenrhoden/ceph-deploy,shenhequnying/ceph-deploy,ceph/ceph-deploy,ghxandsky/ceph-deploy,zhouyuan/ceph-deploy,SUSE/ceph-deploy,trhoden/ceph-deploy