remove d2go.tests package from setup

Summary: all utils code are moved to d2go.utils.testing

Reviewed By: newstzpz

Differential Revision: D27209943

fbshipit-source-id: 6c5cb14858155a8ed13478d65ee8e02ef74616d7

setup.py

@@ -83,7 +83,6 @@ if __name__ == '__main__':
                 'LICENSE',
             ],
             "d2go.model_zoo": get_model_zoo_configs(),
-            "d2go.tests": d2go_gather_files("tests", "tests", "**/*helper.py"),
             "d2go.tools": d2go_gather_files("tools", "tools", "**/*.py"),
         },
         entry_points={