Removes unused function from populate_db.py

scipost/management/commands/populate_db.py

@@ -16,7 +16,5 @@ class Command(BaseCommand):
         contributor.vetted_by = contributor
         contributor.save()
 
-    def create_theses(self):
-
     def handle(self, *args, **options):
         self.create_contributor(options['username'])