modify setup.py

setup.py

 import setuptools
 
-with open("README.md", "r") as fh:
-    long_description = fh.read()
-
 setuptools.setup(
     name="x2paddle",
     version="dev-0.4",
@@ -10,7 +7,6 @@ setuptools.setup(
     author_email="dltp-sz@baidu.com",
     description=
     "a toolkit for converting trained model to PaddlePaddle from other deep learning frameworks.",
-    long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/PaddlePaddle/x2paddle",
     packages=setuptools.find_packages(),