Remove apt notification.
Remove apt notification.

Fixes #56. The apt resource may not be included, so no need to run a
notification on it.

jujugrrr/varnish,gusrc/varnish,KierranM/varnish,rackspace-cookbooks/varnish,KierranM/varnish,yoshiwaan/varnish,GannettDigital/chef-varnish,elastera/varnish,rackspace-cookbooks/varnish,yoshiwaan/varnish,GannettDigital/chef-varnish,gusrc/varnish,gsreynolds/varnish,rackspace-cookbooks/varnish,gsreynolds/varnish,jujugrrr/varnish,elastera/varnish,gusrc/varnish