AP_HAL_Empty: Remove set_overrides() method

libraries/AP_HAL_Empty/RCInput.cpp

@@ -29,10 +29,6 @@ uint8_t RCInput::read(uint16_t* periods, uint8_t len) {
     return len;
 }
 
-bool RCInput::set_overrides(int16_t *overrides, uint8_t len) {
-    return true;
-}
-
 bool RCInput::set_override(uint8_t channel, int16_t override) {
     return true;
 }

libraries/AP_HAL_Empty/RCInput.h

@@ -11,7 +11,6 @@ public:
     uint16_t read(uint8_t ch);
     uint8_t read(uint16_t* periods, uint8_t len);
 
-    bool set_overrides(int16_t *overrides, uint8_t len);
     bool set_override(uint8_t channel, int16_t override);
     void clear_overrides();
 };