gpio: remove flag MRAA_GPIO_DISABLE

Signed-off-by: Nascs <[email protected]>

Author: nascs

src/gpio/gpio.c

@@ -1116,9 +1116,6 @@ mraa_gpio_mode(mraa_gpio_context dev, mraa_gpio_mode_t mode)
             case MRAA_GPIO_PULLDOWN:
                 flags |= GPIOHANDLE_REQUEST_BIAS_PULL_DOWN;
                 break;
-            case MRAA_GPIO_DISABLE:
-                flags |= GPIOHANDLE_REQUEST_BIAS_DISABLE;
-                break;
             default:
                 return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
         }