Don't set base_domain in Vagrantfile

It's already set in playbook.yml according to the vagrant variable.

Vagrantfile

@@ -21,9 +21,6 @@ Vagrant.configure(2) do |config|
     ansible.playbook = "playbook.yml"
     ansible.ask_vault_pass = true
     ansible.verbose = "v"
-    ansible.extra_vars = {
-      base_domain: "datacoop.devel"
-    }
 
     # If the VM is already provisioned, we need to use the new port
     if provisioned?