Function remove_sign

dependencies/json/json.hpp:16412–16416

* Overload to make the compiler happy while it is instantiating * dump_integer for number_unsigned_t. * Must never be called. */

     * Must never be called.
     */
    number_unsigned_t remove_sign(number_unsigned_t x)
    {
        JSON_ASSERT(false); // LCOV_EXCL_LINE
        return x; // LCOV_EXCL_LINE
    }

    /*
     * Helper function for dump_integer