[MachineVerifier] Simplify and delete LLVM_VERIFY_MACHINEINSTRS from a comment. NFC

// Register live intervals: Registers must be defined only once, and must be

// defined before use.

//

// The machine code verifier is enabled from LLVMTargetMachine.cpp with the

// command-line option -verify-machineinstrs, or by defining the environment

// variable LLVM_VERIFY_MACHINEINSTRS to the name of a file that will receive

// the verifier errors.

// The machine code verifier is enabled with the command-line option

// -verify-machineinstrs.

//===----------------------------------------------------------------------===//

#include "llvm/ADT/BitVector.h"

  if (isFunctionFailedISel)

    return foundErrors;

  isFunctionRegBankSelected =

      !isFunctionFailedISel &&

      MF.getProperties().hasProperty(

  isFunctionRegBankSelected = MF.getProperties().hasProperty(

      MachineFunctionProperties::Property::RegBankSelected);

  isFunctionSelected = !isFunctionFailedISel &&

                       MF.getProperties().hasProperty(

  isFunctionSelected = MF.getProperties().hasProperty(

      MachineFunctionProperties::Property::Selected);

  LiveVars = nullptr;

  LiveInts = nullptr;

  LiveStks = nullptr;