Fix incorrect override for pop method

This method could never return None because a missing key would raise
instead, which is the expected behavior of the base class.

Author: HexDecimal

tcod/ecs/entity.py

@@ -553,7 +553,7 @@ def setdefault(self, __key: ComponentKey[T], __default: T, /) -> T:
             return __default
 
     @overload
-    def pop(self, __key: ComponentKey[T], /) -> T | None: ...
+    def pop(self, __key: ComponentKey[T], /) -> T: ...
     @overload
     def pop(self, __key: ComponentKey[T], /, default: _T1) -> T | _T1: ...