TEST: remove unneeded Update call and inverse computation

Testing/otbUnConstrainedLeastSquareImageFilter.cxx

@@ -56,7 +56,6 @@ int otbUnConstrainedLeastSquareImageFilterTest(int argc, char * argv[])
 
   typedef VectorImageToMatrixImageFilterType::MatrixType MatrixType;
   MatrixType endMembers = endMember2Matrix->GetMatrix();
-  MatrixType pinv = vnl_matrix_inverse<PixelType>(endMembers);
 
   UnConstrainedLeastSquareSolverType::Pointer unmixer = \
       UnConstrainedLeastSquareSolverType::New();
@@ -64,8 +63,6 @@ int otbUnConstrainedLeastSquareImageFilterTest(int argc, char * argv[])
   unmixer->SetInput(readerImage->GetOutput());
   unmixer->SetMatrix(endMember2Matrix->GetMatrix());
 
-  unmixer->Update();
-
   WriterType::Pointer writer = WriterType::New();
   writer->SetFileName(outputImage);
   writer->SetInput(unmixer->GetOutput());