fix unused variable warning
fix unused variable warning

pasuka/eigen,TSC21/Eigen,TSC21/Eigen,ritsu1228/eigen,pasuka/eigen,TSC21/Eigen,TSC21/Eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,pasuka/eigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen