Remove makeMockThreadSafe()

It doesn't appear to be compatible with newer versions of python
and the mock library, and wasn't working correctly anyways.

Change-Id: I117d01bed40849587b2d0337aad56fccdf77e192

armada/tests/test_utils.py

@@ -17,34 +17,10 @@
 #    under the License.
 import random
 import string
-import threading
 import uuid
 
-import mock
 import testtools
 
-_mock_thread_safe = False
-_mock_call_lock = threading.RLock()
-
-
-# TODO(seaneagan): Get this working.
-def makeMockThreadSafe():
-    '''
-        This attempts to make a subset of the mock library thread safe using
-        locking, so that the mock call records are accurate.
-    '''
-    global _mock_thread_safe
-    if not _mock_thread_safe:
-        unsafe_mock_call = mock.CallableMixin._mock_call
-
-        def safe_mock_call(*args, **kwargs):
-            with _mock_call_lock:
-                return unsafe_mock_call(*args, **kwargs)
-
-        mock.CallableMixin._mock_call = safe_mock_call
-
-        _mock_thread_safe = True
-
 
 def rand_uuid_hex():
     """Generate a random UUID hex string

armada/tests/unit/handlers/test_armada.py

@@ -19,7 +19,7 @@ from armada import const
 from armada.handlers import armada
 from armada.utils.helm import TESTRUN_STATUS_SUCCESS, TESTRUN_STATUS_FAILURE
 from armada.tests.unit import base
-from armada.tests.test_utils import AttrDict, makeMockThreadSafe
+from armada.tests.test_utils import AttrDict
 from armada.utils.release import release_prefixer, get_release_status
 from armada.exceptions import ManifestException
 from armada.exceptions.override_exceptions import InvalidOverrideValueException
@@ -27,8 +27,6 @@ from armada.exceptions.validate_exceptions import InvalidManifestException
 from armada.exceptions import tiller_exceptions
 from armada.exceptions.armada_exceptions import ChartDeployException
 
-makeMockThreadSafe()
-
 TEST_YAML = """
 ---
 schema: armada/Manifest/v1