Removes unused site.yml playbook
Removes unused site.yml playbook

The site.yml playbook referenced all other playbooks
(development, staging, and production) and shouldn't ever
be run. Each playbook is targeted with specific tests
in CI pipeline, so OK to remove the site.yml file.

garrettr/securedrop,conorsch/securedrop,ageis/securedrop,micahflee/securedrop,conorsch/securedrop,heartsucker/securedrop,ageis/securedrop,garrettr/securedrop,heartsucker/securedrop,micahflee/securedrop,ehartsuyker/securedrop,pwplus/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,pwplus/securedrop,heartsucker/securedrop,heartsucker/securedrop,conorsch/securedrop,pwplus/securedrop,micahflee/securedrop,pwplus/securedrop,garrettr/securedrop,pwplus/securedrop,ehartsuyker/securedrop,ageis/securedrop,garrettr/securedrop,ehartsuyker/securedrop,pwplus/securedrop,ehartsuyker/securedrop,ageis/securedrop,micahflee/securedrop,heartsucker/securedrop