Fixed hibernate/powerOff for ESP32 boards to stay at uA

variants/heltec_v4/HeltecV4Board.h

@@ -3,7 +3,6 @@
 #include <Arduino.h>
 #include <helpers/RefCountedDigitalPin.h>
 #include <helpers/ESP32Board.h>
-#include <driver/rtc_io.h>
 #include "LoRaFEMControl.h"
 
 #ifndef ADC_MULTIPLIER
@@ -23,7 +22,6 @@ public:
   void begin();
   void onBeforeTransmit(void) override;
   void onAfterTransmit(void) override;
-  void enterDeepSleep(uint32_t secs, int pin_wake_btn = -1);
   void powerOff() override;
   bool setLoRaFemLnaEnabled(bool enable) override;
   bool canControlLoRaFemLna() const override;