removed now unused imports

tangostationcontrol/tangostationcontrol/test/beam/test_delays.py

 import datetime
 
 from tangostationcontrol.beam.delays import *
-from math import sqrt, pow
-
 from tangostationcontrol.test import base
 
 
@@ -22,7 +20,6 @@ class TestDelays(base.TestCase):
 
     def test_sun(self):
         # # create a frame tied to the reference position
-        #reference_itrf = [3826577.066, 461022.948, 5064892.786]  # CS002LBA, in ITRF2005 epoch 2012.5
         reference_itrf = [3826577.066, 461022.948, 5064892.786]
         d = delay_calculator(reference_itrf)