fix bug with Main.tscn

user-interface/Main.tscn

-[gd_scene load_steps=3 format=2]
+[gd_scene load_steps=2 format=2]
 
 [ext_resource path="res://scene-tree/sign/sign.tscn" type="PackedScene" id=1]
-[ext_resource path="res://Node.gd" type="Script" id=2]
 
-[node name="Main" type="Node" index="0"]
+[node name="Main" type="Node"]
 
 [node name="sign" parent="." index="0" instance=ExtResource( 1 )]
 
-[node name="Node" type="Node" parent="." index="1"]
-
-script = ExtResource( 2 )
-