schemas/vegbien.sql: taxonconcept: taxonconcept_required_key: Removed family and genus because these are now cached fields only, and are not used for scoping a taxonconcept. Instead, *taxonomicname and taxonname+parent_id are used for this purpose. This removes several leaf taxonconcepts with insufficient scoping information to create a taxonconcept separate from the main tree. With the upcoming population of creationdate, some of these taxonconcepts will reappear due to the date's additional distinguishing information.