MIPS: Get rid of the unused (and partially defined) CacheError fault.

src/arch/mips/faults.hh

@@ -226,23 +226,6 @@ class DtbAcvFault : public MipsFault
     FaultStat & countStat() {return _count;}
 };
 
-class CacheErrorFault : public MipsFault
-{
-  private:
-    Addr vaddr;
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-    void invoke(ThreadContext * tc,
-            StaticInstPtr inst = StaticInst::nullStaticInstPtr);
-};
-
-
-
 
 static inline Fault genMachineCheckFault()
 {