Summary:
The old NylasAPIRequest helper class used to do all sorts of run-time
requiring to attempt to notify of auth errors when 401s and 403s came up
in a request. We now move that logic to the AccountStore where it belongs.
Depends on D4057
Test Plan: Manual
Reviewers: spang, halla, juan
Reviewed By: halla, juan
Differential Revision: https://phab.nylas.com/D4060