more cleanup

src/main.cpp

 #include "config.h"
 #include "states.h"
-#include <Arduino_LoRaWAN_ttn.h>
-#include <lmic.h>
-#include <hal/hal.h>
-#include <SPI.h>
-#include <CayenneLPP.h>
 #include "power.h"
 #include "gps.h"
 #include "lora.h"
 #include "button.h"
+#include <CayenneLPP.h>
 
 int state;
 RTC_DATA_ATTR int bootCount = 0;
@@ -34,7 +30,7 @@ void printPayload() {
 static void bootInfo()
 {
     ++bootCount;
-    Serial.println("Boot number: " + String(bootCount));
+    Serial.printf("Boot number: %d\n", bootCount);
 
     esp_sleep_wakeup_cause_t wakeup_reason;
     wakeup_reason = esp_sleep_get_wakeup_cause();