Remove "global_files" from ansible config.

Directory doesn't exist in ansible playbook repo anymore.

Change-Id: Iedef3a2b288139da8cf10372c263d426b784ba69

conf/package_installer/ansible-juno.conf

@@ -9,6 +9,6 @@ SETTINGS = {
     'inventory_file': 'inventory.yml',
     'group_variable': 'all',
     'etc_hosts_path': 'roles/common/templates/hosts',
-    'runner_dirs': ['global_files', 'roles']
+    'runner_dirs': ['roles']
 }