Remove a useless declarations (found by scan-build)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185709 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/CodeGenPrepare.cpp

@@ -868,7 +868,6 @@ void ExtAddrMode::print(raw_ostream &OS) const {
     OS << (NeedPlus ? " + " : "")
        << Scale << "*";
     WriteAsOperand(OS, ScaledReg, /*PrintType=*/false);
-    NeedPlus = true;
   }
 
   OS << ']';