drop custom encoding warning as min python bump to 3.10

DanielYang59 · DanielYang59 · commit d54bde4c6fa0 · 2024-12-12T18:56:14.000+08:00
diff --git a/src/monty/io.py b/src/monty/io.py
@@ -22,9 +22,6 @@
     from typing import IO, Any, Iterator, Union
 
 
-class EncodingWarning(Warning): ...  # Added in Python 3.10
-
-
 def zopen(
     filename: Union[str, Path],
     /,
diff --git a/tests/test_io.py b/tests/test_io.py
@@ -9,7 +9,6 @@
 import pytest
 
 from monty.io import (
-    EncodingWarning,
     FileLock,
     FileLockException,
     _get_line_ending,
