⚰️ Remove unused Item type.

Author: Raphael Krupinski

src/lapidary/render/model/stack.py

@@ -1,10 +1,8 @@
 from functools import lru_cache
-from typing import Any, Self
+from typing import Self
 
 from ..json_pointer import encode_json_pointer
 
-type Item = tuple[str | int, Any]
-
 
 class Stack:
     __slots__ = ('path',)