Bug 1714688 - Removed 'if PY3' logic from testing/mozbase r=mhentges

Python2 is no longer used in testing/mozbase

Differential Revision: https://phabricator.services.mozilla.com/D118040

testing/mozbase/mozinfo/tests/test.py

@@ -17,12 +17,7 @@ import mozinfo
 
 import mozunit
 
-PY3 = sys.version_info[0] == 3
-
-if PY3:
-    # reload() has been moved to importlib in Python 3
-    # see https://docs.python.org/3.5/library/importlib.html#importlib.reload
-    from importlib import reload
+from importlib import reload
 
 
 class TestMozinfo(unittest.TestCase):

testing/mozbase/mozinstall/mozinstall/mozinstall.py

@@ -17,7 +17,7 @@ import zipfile
 
 import requests
 
-from six import PY3, reraise
+from six import reraise
 
 import mozfile
 import mozinfo
@@ -57,10 +57,8 @@ class UninstallError(Exception):
 
 
 def _readPlist(path):
-    if PY3:
-        with open(path, "rb") as fp:
-            return plistlib.load(fp)
-    return plistlib.readPlist(path)
+    with open(path, "rb") as fp:
+        return plistlib.load(fp)
 
 
 def get_binary(path, app_name):