Removed unused imports.

Lib/turtledemo/__main__.py

@@ -95,7 +95,6 @@ from idlelib.textView import view_text
 from turtledemo import __doc__ as about_turtledemo
 
 import turtle
-import time
 
 demo_dir = os.path.dirname(os.path.abspath(__file__))
 darwin = sys.platform == 'darwin'

Lib/turtledemo/bytedesign.py

@@ -22,7 +22,6 @@ to 0, this animation runs in "line per line"
 mode as fast as possible.
 """
 
-import math
 from turtle import Turtle, mainloop
 from time import clock
 

Lib/turtledemo/planet_and_moon.py

@@ -18,7 +18,6 @@ mouse over the scrollbar of the canvas.
 
 """
 from turtle import Shape, Turtle, mainloop, Vec2D as Vec
-from time import sleep
 
 G = 8