[Code Cleanup] Remove an unused import

calsocial/models.py

@@ -24,7 +24,6 @@ from warnings import warn
 from flask_babelex import lazy_gettext
 from flask_security import UserMixin, RoleMixin
 from flask_sqlalchemy import SQLAlchemy
-from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy_utils.types.choice import ChoiceType