[setup] Remove Py-version dependency < 3.4

Since we only fully support Python 3.6+.

Author: mpsonntag

setup.py

@@ -1,6 +1,5 @@
 import json
 import os
-import sys
 
 try:
     from setuptools import setup
@@ -36,9 +35,6 @@
 
 tests_req = ["pytest", "owlrl", "requests"]
 
-if sys.version_info < (3, 4):
-    install_req += ["enum34"]
-
 setup(
     name='odML',
     version=VERSION,