Remove all references to standalone h_ij matrix

[j-c-cook]

The library makes use of a reduced segment response matrix that is inside of a struct

cpgfunction/include/cpgfunction/heat_transfer.h

Lines 19 to 36 in 7ba7a07

	struct SegmentResponse {
	~SegmentResponse() {} // destructor
	int nSources;
	int nSum;
	vector < vector < double > > h_ij;
	vector<gt::boreholes::Borehole> boreSegments;
	SegmentResponse(int nSources, int nSum, int nt) : nSources(nSources), boreSegments(nSources),
	h_ij(nSum, vector<double>(nt, 0)), nSum(nSum)
	{} // constructor
	// storage_mode = 1 is the reduced segment response vector
	int storage_mode = 1;
	// void ReSizeContainers(int n, int nt);
	void get_h_value(double &h, int i, int j, int k);
	void get_index_value(int &index, int i, int j);

There used to be an h_ij vector that stood alone and was passed around. It needs removed.