Update sch_detector.py

Commented import that caused problems with running/pybombs installation.
diff --git a/python/receiver/sch_detector.py b/python/receiver/sch_detector.py
index 561c1fa..cdf9a9e 100644
--- a/python/receiver/sch_detector.py
+++ b/python/receiver/sch_detector.py
@@ -20,7 +20,7 @@
 # 
 
 from numpy import *
-from pylab import *
+#from pylab import *
 from gnuradio import gr
 import pmt
 from scipy.ndimage.filters import uniform_filter1d