Remove check for present name in terms that are imported. If we do such validation, we need to do this on a more pluggable level.

#929058 alex_b: Report status of source on import and delete forms, track last updated time on a source level.

- DRUPAL-7--1-0-alpha2 http://github.com/lxbarth/feeds/tree/DRUPAL-7--1-0-alpha2
and
- DRUPAL-7--2-0-alpha1 http://github.com/lxbarth/feeds/tree/DRUPAL-7--2-0-alpha1