refactor: no need to inherit in python3 clean the code (#5659)

### What problem does this PR solve?

As title

### Type of change


- [x] Refactoring

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

sdk/python/ragflow_sdk/modules/base.py

@@ -14,7 +14,7 @@
 #  limitations under the License.
 #
 
-class Base(object):
+class Base:
     def __init__(self, rag, res_dict):
         self.rag = rag
         for k, v in res_dict.items():