Fix broken game test

dungeonbattle/interfaces.py

@@ -33,6 +33,12 @@ class Map:
         self.entities.append(entity)
         entity.map = self
 
+    def remove_entity(self, entity: "Entity") -> None:
+        """
+        Unregister an entity from the map.
+        """
+        self.entities.remove(entity)
+
     def is_free(self, y: int, x: int) -> bool:
         """
         Indicates that the case at the coordinates (y, x) is empty.
@@ -138,9 +144,10 @@ class Entity:
             self.move(y, x)
         return free
 
-    def move(self, y: int, x: int) -> None:
+    def move(self, y: int, x: int) -> bool:
         self.y = y
         self.x = x
+        return True
 
     def move_up(self, force: bool = False) -> bool:
         return self.move(self.y - 1, self.x) if force else \
@@ -192,3 +199,4 @@ class FightingEntity(Entity):
 
     def die(self) -> None:
         self.dead = True
+        self.map.remove_entity(self)