Remove cruft

lib/EFBoard/EFBoard.h

@@ -28,15 +28,13 @@
  */
 
 #include "EFBoardPowerState.h"
-#include "driver/adc.h"
 
 #define EFBOARD_FIRMWARE_VERSION "v1.1.0"
 #define EFBOARD_SERIAL_DEVICE USBSerial    //!< Serial device to use for logging
 #define EFBOARD_SERIAL_BAUD 115200         //!< Baudrate for the serial device
 
 // The Step-Down converter still manages to hold 3.00V with 3,32V input. The ESP needs 3.0V at least
 #define EFBOARD_PIN_VBAT 10                //!< Pin the analog voltage divider for V_BAT is connected to (ADC1_CH9)
-#define EFBOARD_ADC_CHANNEL ADC1_CHANNEL_9 //!< ESP32 ADC1 Channel
 #define EFBOARD_NUM_BATTERIES 3            //!< Number of battery cells used for V_BAT
 #define EFBOARD_VBAT_MAX (1.60 * EFBOARD_NUM_BATTERIES) //!< Voltage at which battery cells are considered full
 #define EFBOARD_VBAT_MIN (1.13 * EFBOARD_NUM_BATTERIES) //!< Voltage at which battery cells are considered empty