Update setup.py [skip ci]

setup.py

@@ -146,10 +146,9 @@ def finalize_options(self):
         ],
         keywords=("alpa distributed parallel machine-learning model-parallelism"
                   "gpt-3 deep-learning language-model python"),
-        packages=find_packages(exclude=["playground"]),
+        packages=find_packages(exclude=["benchmark", "examples", "playground", "tests"]),
         python_requires='>=3.7',
         cmdclass={"install": InstallPlatlib},
-        # distclass=BinaryDistribution,
         install_requires=install_require_list,
         extras_require={
             'dev': dev_require_list,