[flang] Remove unused variable 'nullBoxTy' in ConvertExpr.cpp (NFC)

/data/llvm-project/flang/lib/Lower/ConvertExpr.cpp:728:10: error: unused variable 'nullBoxTy' [-Werror,-Wunused-variable]
    auto nullBoxTy = builder.getRefType(fir::BoxType::get(noneTy));
         ^
1 error generated.

diff --git a/flang/lib/Lower/ConvertExpr.cpp b/flang/lib/Lower/ConvertExpr.cpp
index becaf13..9563911 100644 (file)
--- a/flang/lib/Lower/ConvertExpr.cpp
+++ b/flang/lib/Lower/ConvertExpr.cpp
@@ -725,7 +725,6 @@ public:
         builder.createTemporary(loc, boxType, /*shape=*/mlir::ValueRange{});
     mlir::Value nullBox = builder.create<fir::EmboxOp>(loc, boxType, nullConst);
     builder.create<fir::StoreOp>(loc, nullBox, tempBox);
-    auto nullBoxTy = builder.getRefType(fir::BoxType::get(noneTy));
     return fir::MutableBoxValue(tempBox,
                                 /*lenParameters=*/mlir::ValueRange{},
                                 /*mutableProperties=*/{});