Removed check for whether test_file is set when checking set-up for 'evaluate' and 'cross_validate' conditions; since test_file is set to test_path earlier, this check can be removed.
Removed check for whether test_file is set when checking set-up for 'evaluate' and 'cross_validate' conditions; since test_file is set to test_path earlier, this check can be removed.

ernfrid/skll,ernfrid/skll