Tweak 2D navigation polygon demo camera and remove RPG unused files

2d/navigation/level.tscn

@@ -26,5 +26,5 @@ texture = ExtResource( 3 )
 offset = Vector2( 0, -26 )
 
 [node name="Camera2D" type="Camera2D" parent="."]
-offset = Vector2( 400, 300 )
+offset = Vector2( 420, 300 )
 current = true

2d/role_playing_game/grid_movement/tilesets/grid/GridTiles.tscn

@@ -1,20 +0,0 @@
-[gd_scene load_steps=4 format=2]
-
-[ext_resource path="res://grid_movement/tilesets/grid/actor.png" type="Texture" id=1]
-[ext_resource path="res://grid_movement/tilesets/grid/obstacle.png" type="Texture" id=2]
-[ext_resource path="res://grid_movement/tilesets/grid/object.png" type="Texture" id=3]
-
-[node name="Node2D" type="Node2D"]
-
-[node name="Actor" type="Sprite" parent="."]
-position = Vector2( 32, 32 )
-texture = ExtResource( 1 )
-
-[node name="Obstacle" type="Sprite" parent="."]
-position = Vector2( 96, 32 )
-texture = ExtResource( 2 )
-
-[node name="Object" type="Sprite" parent="."]
-position = Vector2( 160, 32 )
-texture = ExtResource( 3 )
-

2d/role_playing_game/grid_movement/tilesets/grid_lines/GridLinesTiles.tscn

@@ -1,10 +0,0 @@
-[gd_scene load_steps=2 format=2]
-
-[ext_resource path="res://grid_movement/tilesets/grid_lines/grid_lines.png" type="Texture" id=1]
-
-[node name="TileSet" type="Node2D"]
-
-[node name="Grass" type="Sprite" parent="."]
-position = Vector2( 32, 32 )
-texture = ExtResource( 1 )
-