Remove unused import (again)

Author: za3k

lib/markdown2.py

@@ -126,7 +126,6 @@
 from typing import Any, Callable, Dict, List, Literal, Optional, Tuple, Type, TypedDict, Union
 from collections.abc import Collection
 from enum import IntEnum, auto
-from os import urandom
 
 # ---- type defs
 _safe_mode = Literal['replace', 'escape']