[REF] bi_sql_editor : move function into abstract module

bi_sql_editor/models/bi_sql_view.py

@@ -660,9 +660,3 @@ class BiSQLView(models.Model):
                 sql_view.view_name)
             self._log_execute(req)
             sql_view.size = self.env.cr.fetchone()[0]
-
-    @api.multi
-    def button_preview_sql_expression(self):
-        self.button_validate_sql_expression()
-        res = self._execute_sql_request()
-        raise UserError('\n'.join(map(lambda x: str(x), res[:100])))