CI: Remove cruft

Remove unused variables, and intermediary ones.

tests/cloud_playbooks/roles/packet-ci/tasks/main.yml

@@ -45,5 +45,5 @@
 - name: Create inventory for CI tests
   copy:
     content: "{{ ci_inventory | to_yaml }}"
-    dest: "{{ inventory_path }}/ci_inventory.yml"
+    dest: "{{ ansible_inventory_sources[0] }}/ci_inventory.yml"
     mode: "0644"