v.vol.rst: remove unused write to array (backport https://trac.osgeo.org/grass/changeset/68112)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@68921 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.vol.rst/user3.c

@@ -495,7 +495,6 @@ COGRR1(double x_or, double y_or, double z_or, int n_rows, int n_cols,
 			if ((cellinp != NULL) && (cellout != NULL) &&
 			    (i == ngstl))
 			    wwcell = hcell + wmin;
-			A[l] = h;
 			az[l] = ww;
 			if (first_time_z) {
 			    first_time_z = 0;