runtime/core/mlas/lib/pooling.cpp:1345:23: error: unused variable ‘BitFlipVector’ [-Werror=unused-variable]

Describe the bug
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Urgency
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System information

• OS Platform and Distribution (e.g., Linux Ubuntu 18.04):
• ONNX Runtime installed from (source or binary):
• ONNX Runtime version:１．１０．０
• Python version:３．６
• Visual Studio version (if applicable):
• GCC/Compiler version (if compiling from source):
• CUDA/cuDNN version: cuda 10.0,cudnn 7.4
• GPU model and memory:

To Reproduce

• Describe steps/code to reproduce the behavior.
• Attach the ONNX model to the issue (where applicable) to expedite investigation.

build onnxruntime from source,

build command:
./build.sh --parallel --config release --skip_tests --build_shared_lib
--cmake_extra_defines CMAKE_INSTALL_PREFIX=./install

then errors:
runtime/core/mlas/lib/pooling.cpp:1345:23: error: unused variable ‘BitFlipVector’ [-Werror=unused-variable]