COMP: Remove obsolete inner build external project patch step for VTK 8.2

The application of "vtk-8.2.cmake" patch was obsoleted by commit
f796986e (REFAC: VTK 9 and greater dependence, task graph timing
chart disabled, data replacements, example updates)

CMake/External/CMakeLists.txt

@@ -73,14 +73,6 @@ ExternalProject_Include_Dependencies( ${PROJECT_NAME}
   SUPERBUILD_VAR ${PROJECT_NAME}_SUPERBUILD
   )
 
-set(VTK_PATCH_COMMAND)
-if(NOT ${USE_SYSTEM_VTK} AND ${PROJECT_NAME}_VTK_REPO_SOURCE EQUAL "8.2")
-  set(VTK_PATCH_COMMAND ${CMAKE_COMMAND}
-    -DVTK_SOURCE_DIR=${VTK_SOURCE_DIR}
-    -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
-    -P ${CMAKE_SOURCE_DIR}/CMake/External/Patches/vtk-8.2.cmake)
-endif()
-
 set(EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS)
 if(WIN32)
   list(APPEND EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS
@@ -105,9 +97,6 @@ ExternalProject_Add( ${PROJECT_NAME}
     -DVTK_DIR:PATH=${VTK_DIR}
     ${EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS}
   DEPENDS ${${PROJECT_NAME}_DEPENDENCIES}
-  PATCH_COMMAND 
-    COMMAND ${VTK_PATCH_COMMAND}
-    # Always build these non standard configurations
   )
 
 ExternalProject_AlwaysConfigure(${PROJECT_NAME})