ENH: do not force the intel ar on C from CXX

Modules/Platform/Linux-Intel-CXX.cmake

@@ -15,8 +15,5 @@ IF(XIAR)
    SET(CMAKE_CXX_CREATE_STATIC_LIBRARY
       "${XIAR} cr <TARGET> <LINK_FLAGS> <OBJECTS> "
       "${XIAR} -s <TARGET> ")
-  SET(CMAKE_C_CREATE_STATIC_LIBRARY
-      "${XIAR} cr <TARGET> <LINK_FLAGS> <OBJECTS> "
-      "${XIAR} -s <TARGET> ")
 ENDIF(XIAR)
 MARK_AS_ADVANCED(XIAR)