CI: Remove cruft

Remove unused variables, and intermediary ones.

tests/Makefile

@@ -9,20 +9,16 @@ create-tf:
 delete-tf:
 	./scripts/delete-tf.sh
 
-$(INVENTORY_DIR):
+$(ANSIBLE_INVENTORY):
 	mkdir $@
 
-create-packet: init-packet | $(INVENTORY_DIR)
+create-packet: init-packet | $(ANSIBLE_INVENTORY)
 	ansible-playbook cloud_playbooks/create-packet.yml -c local \
-	-e @"files/${CI_JOB_NAME}.yml" \
-	-e test_name="$(subst .,-,$(CI_PIPELINE_ID)-$(CI_JOB_ID))" \
-	-e branch="$(CI_COMMIT_BRANCH)" \
-	-e pipeline_id="$(CI_PIPELINE_ID)" \
-	-e inventory_path=$|
+		-e @"files/${CI_JOB_NAME}.yml"
 
 delete-packet: ;
 
-create-vagrant: | $(INVENTORY_DIR)
+create-vagrant: | $(ANSIBLE_INVENTORY)
 	vagrant up
 	cp $(CI_PROJECT_DIR)/.vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory $|