Comment out unused rlguipp_menu test target in CMakeLists.

Author: gulrak

external/rlguipp/test/CMakeLists.txt

@@ -3,5 +3,5 @@ if(NOT EMSCRIPTEN)
     target_link_libraries(rlguipp_test PUBLIC rlguipp fmt::fmt)
 endif()
 
-add_executable(rlguipp_menu rlguipp_menu.cpp stylemanager.cpp stylemanager.hpp fs_impl.cpp)
-target_link_libraries(rlguipp_menu PUBLIC rlguipp fmt::fmt)
+#add_executable(rlguipp_menu rlguipp_menu.cpp stylemanager.cpp stylemanager.hpp fs_impl.cpp)
+#target_link_libraries(rlguipp_menu PUBLIC rlguipp fmt::fmt)