Refactor angular_system out of 2016 intake

Change-Id: I82272ea74b375861f8472e735fd489b431614ebe
diff --git a/y2016/control_loops/python/BUILD b/y2016/control_loops/python/BUILD
index 08a34e8..93212d8 100644
--- a/y2016/control_loops/python/BUILD
+++ b/y2016/control_loops/python/BUILD
@@ -70,11 +70,10 @@
     restricted_to = ["//tools:k8"],
     deps = [
         ":python_init",
-        "//aos/util:py_trapezoid_profile",
         "//external:python-gflags",
         "//external:python-glog",
+        "//frc971/control_loops/python:angular_system",
         "//frc971/control_loops/python:controls",
-        "@matplotlib",
     ],
 )