message: removed unnecessary traits
diff: @@ -10,12 +10,6 @@ extern crate error_chain;
  extern crate num;
  extern crate rand;
  -/// Trait for forward operators
  -pub trait ArgminOperator {}
  -
  -/// Trait for cost functions
  -pub trait ArgminCost {}
  -
  /// Trait for cost function values
  /// TODO: Do this with trait aliases once they work in rust.
  pub trait ArgminCostValue: num::Float + num::FromPrimitive + PartialOrd {}
  