refactor: can't use system vtk

* We can't cleanly override system vtks rpath which will cause lookup issues

cmake/vtk.cmake

@@ -5,28 +5,8 @@ macro(setup_vtk_env TARGET OUTPUT)
   # built. This is currently the case, and has been the case for prior vtk versions - However we
   # should keep an eye on this.
 
-  if(TARGET vtksys)
-    add_custom_command(
-      TARGET ${TARGET}
-      POST_BUILD
-      COMMAND ${CMAKE_COMMAND} -E copy_directory $<TARGET_FILE_DIR:vtksys> ${OUTPUT})
-  else()
-    add_custom_command(
-      TARGET ${TARGET}
-      POST_BUILD
-      COMMAND ${CMAKE_COMMAND} -E make_directory ${OUTPUT})
-
-    foreach(target ${VTK_LIBRARIES})
-      get_target_property(target_path ${target} LOCATION)
-
-      if(target_path STREQUAL "target_path-NOTFOUND")
-        continue()
-      endif()
-
-      add_custom_command(
-        TARGET ${TARGET}
-        POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy -t ${OUTPUT} ${target_path})
-    endforeach()
-  endif()
+  add_custom_command(
+    TARGET ${TARGET}
+    POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_directory $<TARGET_FILE_DIR:vtksys> ${OUTPUT})
 endmacro()