remove @export from props in game key class

scripts/game_key.gd

@@ -2,8 +2,6 @@
 class_name GameKey extends Node3D
 
 #region variables
-@export var props: KeyProps
-
 @export_group("References")
 @export var player_pos_marker: Node3D
 
@@ -45,6 +43,8 @@ class_name GameKey extends Node3D
 @export var _press_sfx: AudioStream
 @export var _release_sfx: AudioStream
 
+var props: KeyProps
+
 var player_transform: Transform3D
 
 var _keyboard: GameKeyboard