automation: don't create resources when deleting things
Otherwise running these commands can result in resources being
created. In the case of purge-ec2-resources, we will create
resources only to delete them immediately afterwards!
With this change, purge-ec2-resources now no-ops if no
no-check-commit because foo_bar function name
Differential Revision: https://phab.mercurial-scm.org/D6285