clean up bootstrap

gce-remove.yml

diff --git a/gce-remove.yml b/gce-remove.yml
index 7510ffb..f3477f1 100644
--- a/gce-remove.yml
+++ b/gce-remove.yml
@@ -22,4 +22,3 @@
       service_account_email: "{{ service_account_email }}"
       credentials_file: '{{ credentials_file }}'
       state: deleted
-    register: gce