Bug 1529223 - Tests: Correct name/description for test_login_no_email
Bug 1529223 - Tests: Correct name/description for test_login_no_email

Since the name/description references the pre-auth0 implementation that
was removed in #3144. The `test_user` fixture has also been removed,
since it is not required for the test to run (the error referenced in
the comment no longer occurs).

KWierso/treeherder,KWierso/treeherder,edmorley/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder,edmorley/treeherder,edmorley/treeherder