ITS: fix test_zoom.py debug so it is usable.

bug: 187445556
Change-Id: I5e91e7fb6d8846dfbf29cc80b387cc18862d6d7f
diff --git a/apps/CameraITS/tests/scene6/test_zoom.py b/apps/CameraITS/tests/scene6/test_zoom.py
index 8b32057..54fcc4a 100644
--- a/apps/CameraITS/tests/scene6/test_zoom.py
+++ b/apps/CameraITS/tests/scene6/test_zoom.py
@@ -111,8 +111,7 @@
       if colour == color and (1 - CIRCLE_TOL <= circlish <= 1 + CIRCLE_TOL):
         circles.append([shape['ctx'], shape['cty'], radius, circlish, area])
 
-  if debug == 'true':
-    circles.sort(key=lambda x: abs(x[3] - 1.0))  # sort for best circles
+  if debug:
     logging.debug('circles [x, y, r, pi*r**2/area, area]: %s', str(circles))
 
   # find circle closest to center