[MCA][NFC] Removed unused method, and fixed a coverity issue.

The coverity issue was reported agaist class MCAOperand
due to the lack of proper initialization for field Index.

No functional change intended.

llvm/include/llvm/MCA/Instruction.h

@@ -46,7 +46,7 @@ class MCAOperand {
     kSFPImmediate, ///< Single-floating-point immediate operand.
     kDFPImmediate, ///< Double-Floating-point immediate operand.
   };
-  MCAOperandType Kind = kInvalid;
+  MCAOperandType Kind;
 
   union {
     unsigned RegVal;
@@ -62,7 +62,7 @@ class MCAOperand {
   unsigned Index;
 
 public:
-  MCAOperand() : FPImmVal(0) {}
+  MCAOperand() : Kind(kInvalid), FPImmVal(), Index() {}
 
   bool isValid() const { return Kind != kInvalid; }
   bool isReg() const { return Kind == kRegister; }

llvm/tools/llvm-mca/Views/SummaryView.h

@@ -71,12 +71,6 @@ class SummaryView : public View {
   // Used to map resource indices to actual processor resource IDs.
   llvm::SmallVector<unsigned, 8> ResIdx2ProcResID;
 
-  // Compute the reciprocal throughput for the analyzed code block.
-  // The reciprocal block throughput is computed as the MAX between:
-  //   - NumMicroOps / DispatchWidth
-  //   - Total Resource Cycles / #Units   (for every resource consumed).
-  double getBlockRThroughput() const;
-
   /// Compute the data we want to print out in the object DV.
   void collectData(DisplayValues &DV) const;