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

variants/nrf52840/muzi_base/variant.cpp

@@ -63,8 +63,8 @@ void initVariant()
     pinMode(PIN_LED1, OUTPUT);
     digitalWrite(PIN_LED1, HIGH);
 
-    pinMode(PIN_LED2, OUTPUT);
-    digitalWrite(PIN_LED2, HIGH);
+    pinMode(LED_BLUE, OUTPUT);
+    digitalWrite(LED_BLUE, HIGH);
 
     // Initialize LoRa pins
     pinMode(SX126X_RESET, OUTPUT);

variants/nrf52840/muzi_base/variant.h

@@ -43,9 +43,9 @@ extern "C" {
 
 // LEDs
 #define PIN_LED1 (32 + 3) // P1.03, Green
-#define PIN_LED2 (32 + 4) // P1.04, Blue
+#define LED_BLUE (32 + 4) // P1.04, Blue
 
-#define LED_BLUE PIN_LED2
+#define LED_NOTIFICATION LED_BLUE
 #define LED_STATE_ON 0 // State when LED is lit
 
 // Buttons