[MaL] Make PiecewiseLinearInterpolation final.

MathLib/InterpolationAlgorithms/PiecewiseLinearInterpolation.cpp

@@ -34,9 +34,6 @@ PiecewiseLinearInterpolation::PiecewiseLinearInterpolation(
 	}
 }
 
-PiecewiseLinearInterpolation::~PiecewiseLinearInterpolation()
-{}
-
 double PiecewiseLinearInterpolation::getValue(double pnt_to_interpolate) const
 {
 	// search interval that has the point inside

MathLib/InterpolationAlgorithms/PiecewiseLinearInterpolation.h

@@ -22,7 +22,7 @@ namespace MathLib
 /**
  * This class implements a one dimensional piecewise linear interpolation algorithm.
  */
-class PiecewiseLinearInterpolation
+class PiecewiseLinearInterpolation final
 {
 public:
 	/**
@@ -48,8 +48,6 @@ public:
 	                             std::vector<double>&& values_at_supp_pnts,
 	                             bool supp_pnts_sorted = false);
 
-	virtual ~PiecewiseLinearInterpolation();
-
 	/**
 	 * \brief Calculates the interpolation value.
 	 * @param pnt_to_interpolate The point should be located within the range