remove forked

Author: sentrivana

tests/integrations/threading/test_threading.py

@@ -104,7 +104,6 @@ def double(number):
         assert len(event["spans"]) == 0
 
 
-@pytest.mark.forked
 def test_circular_references(sentry_init, request):
     sentry_init(default_integrations=False, integrations=[ThreadingIntegration()])