Raven in tests.

[rerowep]

Package version (if known): > 2.0

Describe the bug

There are still raven imports in tests:

@pytest.yield_fixture()
def sentry_emit():
    """Mock Sentry emit."""
    from raven.handlers.logging import SentryHandler

    with patch.object(SentryHandler, "emit") as sentry_emit:
        yield sentry_emit