COMP: Removed unused variable for itkAnisotropicSimilarityLandmarkBas…

…edTransformInitializer.

This resolves the following compiler warning:
/localscratch/Users/kjweimer/ITK/Modules/Remote/TubeTK/src/Registration/itkAnisotropicSimilarityLandmarkBasedTransformInitializer.hxx:580:9: warning: typedef ‘MatrixType’ locally defined but not used [-Wunused-local-typedefs]
  580 |         MatrixType;
      |         ^~~~~~~~~~

src/Registration/itkAnisotropicSimilarityLandmarkBasedTransformInitializer.hxx

@@ -575,8 +575,6 @@ AnisotropicSimilarityLandmarkBasedTransformInitializer<
 
       typedef typename VersorRigid3DTransformType::VersorType
         VersorType;
-      typedef typename VersorRigid3DTransformType::MatrixType
-        MatrixType;
 
       VersorType versor;
       transform->SetIdentity();