Remove unused test fixture

tests/conftest.py

@@ -5,8 +5,6 @@
 from io import StringIO
 from logging import Logger, StreamHandler
 
-from boto.ec2.cloudwatch import CloudWatchConnection
-
 from dmutils.logging import init_app as logging_init_app
 
 
@@ -45,14 +43,6 @@ def app_with_mocked_logger(request):
         yield create_app(request)
 
 
-@pytest.yield_fixture
-def cloudwatch():
-    with mock.patch('dmutils.metrics.connect_to_region') as connect_to_region:
-        conn = mock.Mock(spec=CloudWatchConnection)
-        connect_to_region.return_value = conn
-        yield conn
-
-
 @pytest.fixture
 def os_environ(request):
     env_patch = mock.patch('os.environ', {})