remove Gui.py, GuiUtils.py, ER_hint_reference.txt and icon.ico from root directory

WebHostLib/lttpsprites.py

@@ -6,7 +6,10 @@ from Utils import local_path
 
 
 def update_sprites_lttp():
-    from Gui import Tk, BackgroundTaskProgress, Sprite, get_image_for_sprite, update_sprites
+    from tkinter import Tk
+    from LttPAdjuster import get_image_for_sprite
+    from LttPAdjuster import BackgroundTaskProgress
+    from LttPAdjuster import update_sprites
 
     # Target directories
     input_dir = local_path("data", "sprites", "alttpr")