Do not require the deprecated users::sysadmins recipe

Write the 4 lines of code instead

site-cookbooks/kosmos-base/recipes/default.rb

@@ -22,7 +22,12 @@ package 'ruby2.1-dev'
 
 package 'mosh'
 
-include_recipe 'users::sysadmins'
+# Searches data bag "users" for groups attribute "sysadmin".
+# Places returned users in Unix group "sysadmin" with GID 2300.
+users_manage 'sysadmin' do
+  group_id 2300
+  action [:remove, :create]
+end
 
 node.override['authorization']['sudo']['passwordless'] = true
 include_recipe 'sudo'