This option came from Spree and we never used it. The config input field
is disabled in the admin interface and I checked our managed databases.
I don't think that we will want this feature in the future either.
Staging sends unmodified emails which is more realistic and we haven't
had a use case to intercept those emails. There's still the BCC option
if we need additional access.
The `login_as_admin_and_visit` helper was used a lot but isn't really
shorter than:
login_as_admin
visit path_visit
Calling those methods separately reduces line length. It also removes
the potential impression that it may be more efficient to use the
helper. Now we have less indirection if one of the calls fails and see
the failing spec line straight away.
