All dependencies on UserData class/factory gone.

Next up: killing the database table. One less bit of redundancy.

RSpec: 870 examples, 0 failures, 32 pending
RuboCop: 194 files inspected, no offenses detected
UserData, including the DB table, is gone.

Recommend running `rake db:migrate && RAILS_ENV=test rake db:reset
db:seed`. YHBW.

RSpec: 857 examples, 0 failures, 32 pending
RuboCop: 191 files inspected, no offenses detected