Rover: remove some unused functions

APMrover2/compat.pde

@@ -20,18 +20,3 @@ static uint32_t micros()
     return hal.scheduler->micros();
 }
 
-static void pinMode(uint8_t pin, uint8_t output)
-{
-    hal.gpio->pinMode(pin, output);
-}
-
-static void digitalWrite(uint8_t pin, uint8_t out)
-{
-    hal.gpio->write(pin,out);
-}
-
-static uint8_t digitalRead(uint8_t pin)
-{
-    return hal.gpio->read(pin);
-}
-