Remove from the Python 2.7 category on pypi

Signed-off-by: Juanjo Alvarez <juanjo@sourced.tech>

Author: Juanjo Alvarez

setup.py

@@ -161,7 +161,6 @@ def main():
             "Intended Audience :: Developers",
             "License :: OSI Approved :: Apache Software License",
             "Operating System :: POSIX",
-            "Programming Language :: Python :: 2.7",
             "Programming Language :: Python :: 3.4",
             "Programming Language :: Python :: 3.5",
             "Programming Language :: Python :: 3.6",