removed doubled dependency
diff --git a/setup.py b/setup.py
index f134ffe..f2a6ce9 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,6 @@
       packages=find_packages('src'),
       install_requires=[
           'pyaml',
-          'six',
           'zerorpc',
           'tabulate',
           'argparse',