Remove Ubuntu 20.04 for now as well
Remove Ubuntu 20.04 for now as well

It's coming back once we work out our AMI / python 2 issues

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

jaymzh/chef,tas50/chef-1,mattray/chef,chef/chef,nvwls/chef,MsysTechnologiesllc/chef,mattray/chef,higanworks/chef,nvwls/chef,nvwls/chef,mwrock/chef,gene1wood/chef,mwrock/chef,mwrock/chef,jaymzh/chef,gene1wood/chef,tas50/chef-1,gene1wood/chef,jaymzh/chef,MsysTechnologiesllc/chef,chef/chef,mwrock/chef,nvwls/chef,mattray/chef,gene1wood/chef,nvwls/chef,chef/chef,chef/chef,mattray/chef,tas50/chef-1,mattray/chef,higanworks/chef,MsysTechnologiesllc/chef,nvwls/chef,higanworks/chef,jaymzh/chef,higanworks/chef,MsysTechnologiesllc/chef,higanworks/chef,tas50/chef-1