Find{BLAS,LAPACK}: Drop unnecessary mark_as_advanced calls

Cache entries created by `try_compile` are already `INTERNAL`.

Modules/FindBLAS.cmake

@@ -167,7 +167,6 @@ macro(Check_Fortran_Libraries LIBRARIES _prefix _name _flags _list _thread)
       check_function_exists("${_name}_" ${_prefix}${_combined_name}_WORKS)
     endif()
     set(CMAKE_REQUIRED_LIBRARIES)
-    mark_as_advanced(${_prefix}${_combined_name}_WORKS)
     set(_libraries_work ${${_prefix}${_combined_name}_WORKS})
   endif()
   if(_libraries_work)

Modules/FindLAPACK.cmake

@@ -142,7 +142,6 @@ if(_libraries_work)
     check_fortran_function_exists(${_name} ${_prefix}${_combined_name}_WORKS)
   endif ()
   set(CMAKE_REQUIRED_LIBRARIES)
-  mark_as_advanced(${_prefix}${_combined_name}_WORKS)
   set(_libraries_work ${${_prefix}${_combined_name}_WORKS})
   #message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}")
 endif()