message: removes unnecessary warning
diff: @@ -10,7 +10,8 @@ extern crate rand;
  use argmin::prelude::*;
  use argmin::solver::simulatedannealing::{SATempFunc, SimulatedAnnealing};
  use argmin::testfunctions::rosenbrock;
  -use rand::{Rng, ThreadRng};
  +use rand::Rng;
  +// use rand::ThreadRng;
  #[derive(Clone)]
  struct MyProblem {
  