Arcyd: test new abdt_conduit predicates

Exercise the new is_review_accepted() and is_review_abandoned() members
a little.

Test Plan:
$ ./precommit.sh
Arcyd: remove unused abdt_git.set_name_email

Remove an unused method and consequently an otherwise unused module
at the same time.

Test Plan:
$ ./precommit.sh

ensure is empty
$ git grep set_name_email