do not build docs for vtk9

ci/build_mpi_complete_vtk9.sh

@@ -15,7 +15,7 @@ mkdir -p build && cd build
 if [[ $? == 0 ]]; then
 
     #CC=/usr/lib64/mpi/gcc/openmpi3/bin/mpicc CXX=/usr/lib64/mpi/gcc/openmpi3/bin/mpicxx FC=/usr/lib64/mpi/gcc/openmpi3/bin/mpif90 ${CMAKE} ..
-    ${CMAKE} .. -DCM_ALL_FORTRAN=ON -DCM_ALL_USE_F08=ON -DCM_ALL_VORONOI=ON -DCM_ALL_VTK_OUTPUT=ON -DCM_ALL_TESTS=ON -DCM_ALL_AUTO_DOC=ON -DVTK_DIR=/usr/local/lib/cmake/vtk-9.0 
+    ${CMAKE} .. -DCM_ALL_FORTRAN=ON -DCM_ALL_USE_F08=ON -DCM_ALL_VORONOI=ON -DCM_ALL_VTK_OUTPUT=ON -DCM_ALL_TESTS=ON -DCM_ALL_AUTO_DOC=OFF -DVTK_DIR=/usr/local/lib/cmake/vtk-9.0 
     make VERBOSE=1
     make test
 fi