Do not use keyword argument for sequence_next_number SQL

issue10621
review342831002
(grafted from b7ba7525fd00e7560e52868a51421a5a22afa7c0)

--HG--
branch : 6.0

trytond/backend/postgresql/database.py

@@ -718,7 +718,7 @@ class Database(DatabaseInterface):
                     'SELECT CASE WHEN NOT is_called THEN last_value '
                     'ELSE last_value + increment_by '
                     'END '
-                    'FROM {}').format(sequence=Identifier(name)))
+                    'FROM {}').format(Identifier(name)))
         return cursor.fetchone()[0]
 
     def has_channel(self):