The function of createOpenCLSymbolsOperatorSingleInstance() is:

OpenCLSymbolsOperator* OpenCLSymbolsOperator::createOpenCLSymbolsOperatorSingleInstance() {
    static std::once_flag sFlagInitSymbols;
    static OpenCLSymbolsOperator* gInstance = nullptr;
    std::call_once(sFlagInitSymbols, [&]() {
        gInstance = new OpenCLSymbolsOperator;
    });
    return gInstance;
}

I don’t find the place to delete the gInstance handle in MNN,how to solve it?