drop legacy patch import

With this extension only supporting Python 3, there is no longer a need
to provide a fallback import for the patch call; dropping.

Signed-off-by: James Knight <[email protected]>

Author: jdknight

tests/unit-tests/test_config_postfix_formatting.py

@@ -8,12 +8,7 @@
 from tests.lib.testcase import ConfluenceTestCase
 from tests.lib import parse
 from tests.lib.testcase import setup_builder
-# python2.7 is still supported so unittest will not contain mock so we must
-# catch the import error and import it from the installed module instead
-try:
-    from unittest.mock import patch
-except ImportError:
-    from mock import patch
+from unittest.mock import patch
 
 
 class TestCreateDocnameUniqueHash(ConfluenceTestCase):