remove a couple more unneeded class variables

Author: RetiredWizard

Fruit_Jam/Fruit_Jam_PyPaint/code.py

@@ -192,8 +192,6 @@ def __init__(self, splash, cursor_bmp, screen_width, screen_height):
         self.left_button_pressed = False
         self.right_button_pressed = False
         self.mouse = None
-        self.buf = None
-        self.in_endpoint = None
 
         # Mouse position
         self.mouse_x = screen_width // 2