Removed deprecated 'clock' import.

samples/python/lk_track.py

@@ -26,7 +26,6 @@ import cv2 as cv
 
 import video
 from common import anorm2, draw_str
-from time import clock
 
 lk_params = dict( winSize  = (15, 15),
                   maxLevel = 2,

samples/python/video.py

@@ -39,9 +39,6 @@ import re
 
 from numpy import pi, sin, cos
 
-# built-in modules
-from time import clock
-
 # local modules
 from tst_scene_render import TestSceneRender
 import common