fix lint

Author: cnguyenpm

openfisca_france/model/prelevements_obligatoires/droits_de_donation.py

@@ -22,4 +22,3 @@ def formula_2015_01_01(individu, period, parameters):
         don = individu('don', period)
         taux = parameters(period).taxation_capital.donation.taux_sans_parente
         return don * taux
-