[1828] Don't redirect stderr in tests

src/bin/zonemgr/tests/zonemgr_test.py

@@ -99,8 +99,6 @@ class MyZonemgrRefresh(ZonemgrRefresh):
 
 class TestZonemgrRefresh(unittest.TestCase):
     def setUp(self):
-        self.stderr_backup = sys.stderr
-        sys.stderr = open(os.devnull, 'w')
         self.zone_refresh = MyZonemgrRefresh()
         self.cc_session = FakeCCSession()
 
@@ -602,10 +600,6 @@ class TestZonemgrRefresh(unittest.TestCase):
                           self.zone_refresh.update_config_data,
                           config, self.cc_session)
 
-    def tearDown(self):
-        sys.stderr.close()
-        sys.stderr = self.stderr_backup
-
 class MyZonemgr(Zonemgr):
 
     def __init__(self):