It's time to update the Phone Number Validator to support version 4.7.
In the uninstall function, I tidily remove the settings that get added during install. This looks as follows:
'DELETE FROM civicrm_setting WHERE group_name = "com.civifirst.phonenumbervalidator"'
But the group_name field has been removed. How can we neatly remove settings entries in a way that supports 4.6 and 4.7?