COMP: Do not add Slicer_CMAKE_DIR to the cache

Since Slicer_CMAKE_DIR is computed using the cached value Slicer_SOURCE_DIR,
there is no need to clutter the cache with an additional value.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@17062 3bd1e089-480b-0410-8dfb-8563597acbee

CMakeLists.txt

@@ -28,9 +28,8 @@ SET(CMAKE_MODULE_PATH
   ${Slicer_SOURCE_DIR}/CMake
   ${CMAKE_MODULE_PATH}
   )
-  
-SET(Slicer_CMAKE_DIR "${Slicer_SOURCE_DIR}/CMake" CACHE INTERNAL "")
 
+SET(Slicer_CMAKE_DIR ${Slicer_SOURCE_DIR}/CMake)
 #-----------------------------------------------------------------------------
 # CMake Function(s) and Macro(s)
 #-----------------------------------------------------------------------------