remove seemingly unused code

Tracking/TrkDetDescr/TrkDetDescrUtils/TrkDetDescrUtils/OrderPositionsToStepVector.h

-/*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-*/
-
-///////////////////////////////////////////////////////////////////
-// BinUtility.h, (c) ATLAS Detector software
-///////////////////////////////////////////////////////////////////
-
-#ifndef TRKDETDESCRUTILS_ORDERPOSITIONSTOSTEPVECTOR_H
-#define TRKDETDESCRUTILS_ORDERPOSITIONSTOSTEPVECTOR_H
-
-#include <algorithm>
-#include <vector>
-
-namespace Trk {
-
-/** @class OrderPositionsToStepVector
-
-  Class inheriting from std::vector<double> to transform 1-dim
-  un-aequidistant positions (x,y,z,r-values) into stepvectors
-  for BinUtility1D usage.
-
-  The constructor takes r/z values as a std::vector<double>,
-  a mimimum and a maximum boundary.
-
-  @author Andreas.Salzburger@cern.ch
-
-  */
-
-class OrderPositionsToStepVector : public std::vector<double>
-{
-public:
-  /**Constructor with arguments*/
-  OrderPositionsToStepVector(std::vector<double>& rzvalues, double rzmin, double rzmax);
-  /**Destructor*/
-  ~OrderPositionsToStepVector() {}
-
-private:
-  /** Forbidden constructor */
-  OrderPositionsToStepVector() {}
-};
-
-inline OrderPositionsToStepVector::OrderPositionsToStepVector(std::vector<double>& values, double min, double max)
-  : std::vector<double>(values.size())
-{
-  unsigned int vectorSize = values.size();
-  // sort the vector
-  sort(values.begin(), values.end());
-  // first step - necessary because of correction of parsecLayerRmin
-  double firstStep = fabs(0.5 * (values[1] + values[0]) - min);
-  double lastValue = min + firstStep;
-  push_back(firstStep);
-  // all steps between second and one before last
-  for (unsigned int istep = 2; istep < vectorSize; ++istep) {
-    double currentStep = fabs(0.5 * (values[istep] + values[istep - 1]) - lastValue);
-    push_back(currentStep);
-    lastValue += currentStep;
-  }
-  // last step
-  push_back(fabs(max - 0.5 * (values[vectorSize - 2] + values[vectorSize - 1])));
-}
-
-}
-
-#endif