AP_Generator: remove Python3 suppor from test-loweheiser.py

Author: peterbarker

libraries/AP_Generator/scripts/test-loweheiser.py

@@ -8,8 +8,6 @@
 
 """
 
-from __future__ import print_function
-
 import sys
 import time
 import optparse
@@ -23,12 +21,6 @@
 
 mavutil.set_dialect("all")
 
-# Detect python version
-if sys.version_info[0] < 3:
-    runningPython3 = False
-else:
-    runningPython3 = True
-
 
 class TestLoweheiser(object):
     def __init__(self,