Revert "adding stage handling to card"

This reverts commit 1060f7815f.

src/logic-scenes/board/card.gd

@@ -10,8 +10,6 @@ var noise: Noise = FastNoiseLite.new()
 var wiggle_tween
 var scale_tween
 
-var on_stage = false
-
 @export var text: String = "" :
     set(value):
         text = value
@@ -90,7 +88,6 @@ func _ready():
         _handle_wiggle(0)
 
 func _process(delta: float) -> void:
-    if self.on_stage:
     if highlighted:
         _handle_wiggle(delta)
     
@@ -123,18 +120,16 @@ func _on_focus_exited():
     print(self, "is not focused")
 
 func _on_mouse_entered():
-    if self.on_stage:
     if not Input.is_action_pressed("mouse_left"):
         highlighted = true
         if "handle_hover" in owner:
             owner.handle_hover(self)
 
 func _on_mouse_exited():
-    if self.on_stage:
     highlighted = false
 
 func _on_input_event(viewport, event, shape_idx):
-    if self.on_stage:
+    
     if event is InputEventMouseMotion:
         _move_card()