Remove some incomplete test files

Seems these ghost references were introduced in cc5101a8 without
the accompanying data files. They have never been used in master so
I am removing them to fix data file tarball generation.

Common/DataModel/Testing/Cxx/CMakeLists.txt

@@ -87,13 +87,6 @@ list(APPEND data_tests TestPolyhedron2.cxx)
 vtk_add_test_cxx(${vtk-module}CxxTests output_tests
   TestKdTreeRepresentation.cxx,NO_DATA
   )
-#vtk_add_test_cxx(${vtk-module}CxxTests custom_tests
-#  LagrangeInterpolation.cxx,NO_DATA
-#  CUSTOM_BASELINES
-#  DATA{../Data/Baseline/LagrangeInterpolation_333hex.png,:}
-#  DATA{../Data/Baseline/LagrangeInterpolation_531hex.png,:}
-#  DATA{../Data/Baseline/LagrangeInterpolation_333wedge.png,:}
-#  )
 ExternalData_add_test(VTKData
   NAME TestPolyhedron2
   COMMAND ${vtk-module}CxxTests TestPolyhedron2

Common/DataModel/Testing/Data/Baseline/LagrangeInterpolation_333hex.png.md5

-2e64ca56ffae7aba0332c43a3f2a4daf

Common/DataModel/Testing/Data/Baseline/LagrangeInterpolation_333wedge.png.md5

-ea126f61e0dd973219cc9a1295ec5959

Common/DataModel/Testing/Data/Baseline/LagrangeInterpolation_531hex.png.md5

-1cfea8ddd0c79462f0cb9272f6ce7f3c