removed dataclasses in setup.py as it is integrated in python3.7 and greater (#183)

Author: bshifaw

setup.py

@@ -15,7 +15,6 @@
     license="BSD 3-Clause",
     long_description=open("README.md").read(),
     install_requires="""
-    dataclasses
     termcolor
     click>=8.0.0
     requests