More variant.h cleanup. LED_NOTIFICATION, remove dead code, etc (#9477)

variants/nrf52840/rak4631_epaper/variant.cpp

@@ -36,9 +36,6 @@ void initVariant()
     pinMode(PIN_LED1, OUTPUT);
     ledOff(PIN_LED1);
 
-    pinMode(PIN_LED2, OUTPUT);
-    ledOff(PIN_LED2);
-
     // 3V3 Power Rail
     pinMode(PIN_3V3_EN, OUTPUT);
     digitalWrite(PIN_3V3_EN, HIGH);

variants/nrf52840/rak4631_epaper/variant.h

@@ -45,10 +45,10 @@ extern "C" {
 
 // LEDs
 #define PIN_LED1 (35)
-#define PIN_LED2 (36)
+#define LED_BLUE (36)
 
 #define LED_GREEN PIN_LED1
-#define LED_BLUE PIN_LED2
+#define LED_NOTIFICATION LED_BLUE
 
 #define LED_STATE_ON 1 // State when LED is litted