Remove assert that seems out of place.  It triggers with test_string, but without it test_string passes.  I'm not sure why it was there.
Remove assert that seems out of place.  It triggers with test_string,
but without it test_string passes.  I'm not sure why it was there.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator