Add setting true/false audio background in war level

scenes/levels/levels.gd

@@ -15,7 +15,6 @@ onready var mscene = load("res://db/MScene.gd")
 
 func _ready():
 	_load_translations()
-	_play_ambiant_sound()
 	_load_meshes()
 
 func _process(_delta):
@@ -145,6 +144,3 @@ func _check_collider(space_state):
 		var node = result["collider"].get_parent()
 		if node != null:
 			_start_dissolve(node.name)
-
-func _play_ambiant_sound():
-	$AmbiantSound.play()