Remove unused AXP debug code (#5149)

This was shuffled around a couple years ago, but hasn't been used
since, and we had two copies in the code. Delete it.

src/main.cpp

@@ -27,7 +27,6 @@
 #include "detect/ScanI2CTwoWire.h"
 #include <Wire.h>
 #endif
-#include "detect/axpDebug.h"
 #include "detect/einkScan.h"
 #include "graphics/RAKled.h"
 #include "graphics/Screen.h"
@@ -1190,4 +1189,4 @@ void loop()
         mainDelay.delay(delayMsec);
     }
 }
-#endif
+#endif