ENH: undo optional because we need it

Modules/Platform/Windows-cl.cmake

@@ -30,9 +30,6 @@ ENDIF(CMAKE_GENERATOR MATCHES  "Visual Studio 9")
 
 # make sure to enable languages after setting configuration types
 ENABLE_LANGUAGE(RC)
-IF(NOT CMAKE_RC_COMPILER_WORKS )
-  MESSAGE(STATUS "Warning: RC not found, this build will not be able to compile resource files.")
-ENDIF(NOT CMAKE_RC_COMPILER_WORKS )
 SET(CMAKE_COMPILE_RESOURCE "rc <FLAGS> /fo<OBJECT> <SOURCE>")
 
 # for nmake we need to compute some information about the compiler