remove unused import

account_financial_report_qweb/wizard/open_invoice_wizard.py

@@ -5,7 +5,7 @@
 # Copyright 2016 Camptocamp SA
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp import models, fields, api, _
+from openerp import models, fields, api
 from openerp.exceptions import Warning as UserError
 from datetime import datetime