Removed account_payment_term calculate override

No longer need the account_payment_term calculate method override
and was crashing server when computing invoices

l10n_mx_facturae/invoice.py

@@ -106,24 +106,6 @@ def conv_ascii(text):
     return text
 
 
-class account_payment_term(orm.Model):
-    _inherit = "account.payment.term"
-
-    def compute(self, cr, uid, ids, value, date_ref=False, context=None):
-        if context is None:
-            context = {}
-        if date_ref:
-            try:
-                date_ref = time.strftime(
-                    '%Y-%m-%d', time.strptime(date_ref, '%Y-%m-%d %H:%M:%S')
-                )
-            except:
-                pass
-        return super(account_payment_term, self).compute(
-            cr, uid, ids, value, date_ref, context=context
-        )
-
-
 class account_invoice(orm.Model):
     _inherit = 'account.invoice'
 
@@ -163,7 +145,7 @@ class account_invoice(orm.Model):
                 test = 'code=%s'
                 cr.execute(
                     'SELECT id FROM ir_sequence WHERE ' +
-                    test+' AND active=%s LIMIT 1', (sequence_str, True))
+                    test + ' AND active=%s LIMIT 1', (sequence_str, True))
                 res2 = cr.dictfetchone()
                 sequence_id = res2 and res2['id'] or False
             res[invoice.id] = sequence_id