AP_Compass: remove unused calc_mean_squared_residuals

libraries/AP_Compass/CompassCalibrator.cpp

@@ -461,11 +461,6 @@ float CompassCalibrator::calc_residual(const Vector3f& sample, const param_t& pa
     return params.radius - (softiron*(sample+params.offset)).length();
 }
 
-float CompassCalibrator::calc_mean_squared_residuals() const
-{
-    return calc_mean_squared_residuals(_params);
-}
-
 // calc the fitness given a set of parameters (offsets, diagonals, off diagonals)
 float CompassCalibrator::calc_mean_squared_residuals(const param_t& params) const
 {

libraries/AP_Compass/CompassCalibrator.h

@@ -133,7 +133,6 @@ private:
     // calc the fitness of the parameters (offsets, diagonals, off diagonals) vs all the samples collected
     // returns 1.0e30f if the sample buffer is empty
     float calc_mean_squared_residuals(const param_t& params) const;
-    float calc_mean_squared_residuals() const;
 
     // calculate initial offsets by simply taking the average values of the samples
     void calc_initial_offset();