AP_HAL_Empty: Remove RC overrides

libraries/AP_HAL_Empty/RCInput.cpp

@@ -29,10 +29,3 @@ uint8_t RCInput::read(uint16_t* periods, uint8_t len) {
     return len;
 }
 
-bool RCInput::set_override(uint8_t channel, int16_t override) {
-    return true;
-}
-
-void RCInput::clear_overrides()
-{}
-

libraries/AP_HAL_Empty/RCInput.h

@@ -10,7 +10,4 @@ public:
     uint8_t num_channels();
     uint16_t read(uint8_t ch);
     uint8_t read(uint16_t* periods, uint8_t len);
-
-    bool set_override(uint8_t channel, int16_t override);
-    void clear_overrides();
 };