fix(parser.py): remove call to deleted method is_family()

Author: joephayes

gedcom/parser.py

@@ -381,8 +381,7 @@ def get_families(self, individual, family_type=gedcom.tags.GEDCOM_TAG_FAMILY_SPO
 
         for child_element in individual.get_child_elements():
             is_family = (child_element.get_tag() == family_type
-                         and child_element.get_value() in element_dictionary
-                         and element_dictionary[child_element.get_value()].is_family())
+                         and child_element.get_value() in element_dictionary)
             if is_family:
                 families.append(element_dictionary[child_element.get_value()])