Remove unused requirements

rouge8 · rouge8 · commit f3d90286322e · 2016-08-08T18:21:42.000-07:00
diff --git a/requirements/core.txt b/requirements/core.txt
@@ -1,7 +1,3 @@
 jsonschema==2.5.1
 mmh3==2.3.1
-pbr==1.8.1
-PyYAML==3.11
 requests[security]==2.9.1
-sh==1.11
-six==1.10.0
