Remove old boto documentation and promote AnsibleAWSModule (#36763)
Remove old boto documentation and promote AnsibleAWSModule (#36763)

There should no longer be a need for boto documentation - it
just adds significant extra clutter to the guidelines.

AnsibleAWSModule greatly improves the codebase to such an extent
that we should mandate it for new code unless there is a
documented good reason.
thaim/ansible,thaim/ansible