Faults: Get rid of some commented out code in sim/faults.hh.

src/sim/faults.hh

@@ -55,8 +55,6 @@ class FaultBase : public RefCounted
   public:
     virtual FaultName name() const = 0;
     virtual void invoke(ThreadContext * tc);
-//    template<typename T>
-//    bool isA() {return dynamic_cast<T *>(this);}
     virtual bool isMachineCheckFault() const {return false;}
     virtual bool isAlignmentFault() const {return false;}
 };