Remove unused gitlab-rails attribute

files/gitlab-cookbooks/gitlab/attributes/default.rb

@@ -53,7 +53,6 @@ default['gitlab']['gitlab-rails']['gitlab_port'] = 80
 default['gitlab']['gitlab-rails']['gitlab_https'] = false
 default['gitlab']['gitlab-rails']['gitlab_email_from'] = "gitlab@#{node['fqdn']}"
 default['gitlab']['gitlab-rails']['gitlab_support_email'] = "support@localhost"
-default['gitlab']['gitlab-rails']['support_email'] = "support@example.com"
 default['gitlab']['gitlab-rails']['gitlab_default_projects_limit'] = 10
 default['gitlab']['gitlab-rails']['gitlab_default_can_create_group'] = true
 default['gitlab']['gitlab-rails']['gitlab_username_changing_enabled'] = true