remove unused arguments to load_states function, resolving #234

git-svn-id: https://svn.salilab.org/imp/trunk@17318 e91f8c7b-0e32-4433-a9ac-4502d39a4eab
speed up benchmark a bit

git-svn-id: https://svn.salilab.org/imp/trunk@17319 e91f8c7b-0e32-4433-a9ac-4502d39a4eab