Removing six from dependencies

Murray Christopherson · web-flow · commit 67272d093ae6 · 2018-04-03T13:49:16.000-04:00
Since it should be installed by default. Also, it was causing issues with the Travis build, related to this issue: pypa/setuptools#951
diff --git a/requirements.txt b/requirements.txt
@@ -1,3 +1 @@
-six==1.11.0
 streql==3.0.2
-
