package/glmark2: remove unneeded comment
glmark2 depends on mesa3d which already depends on BR2_INSTALL_LIBSTDCPP
and BR2_TOOLCHAIN_HAS_THREADS_NPTL, glmark2 does not depend on udev so
the comment stating all these dependencies is not needed.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>