The "My Privacy Rights" page in the user account settings was showing an

orphaned :*. This was for the field label for the consent items, but that

form field didn't have a label defined. The cause here was that the Review

Board form field template was checking if the form had a fields_no_label

attribute, but that was deprecated and removed from Djblets a long time ago.

The correct fix is to check if the field has a label defined.

Manual testing by refreshing the My Privacy Rights page and checking that the

empty label is no longer visible. Other labels on the account forms that are

supposed to be there have been verified to be visible.
Doing a search of fields_no_label on all the reviewboard repositories show

no usage of that particular variable.