[FIX] remove method on object because it's the same as in file

account_fiscal_year/models/date_range.py

@@ -3,27 +3,11 @@
 # Copyright 2016 Camptocamp SA
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 from openerp import models, api, _, exceptions
-from openerp.tools import DEFAULT_SERVER_DATE_FORMAT
 
 
 class DateRange(models.Model):
     _inherit = 'date.range'
 
-    def find_daterange_fy_start(self, date):
-        """
-        try to find a date range with type 'fiscalyear'
-        with @param:date <= date_start
-        """
-        fy_id = self.env.ref('account_fiscal_year.fiscalyear')
-        date_str = date.strftime(DEFAULT_SERVER_DATE_FORMAT)
-        s_args = [
-            ('type_id', '=', fy_id.id),
-            ('date_start', '<=', date_str),
-            ('company_id', '=', self.company_id.id),
-        ]
-        date_range = self.env['date.range'].search(s_args)
-        return date_range.date_start
-
     @api.multi
     def unlink(self):
         """