screen-saver-manager: Do not wake up screen on resume

This is already handled by gsd-power:

https://gitlab.gnome.org/GNOME/gnome-settings-daemon/-/blob/master/plugins/power/gsd-power-manager.c#L2781

I'm working on an "Android like" dozing feature and for it working, I need backlight to be handled by gsd-power:

https://gitlab.gnome.org/gnumdk/gnome-settings-daemon/-/blob/07716b72ca9422d3ed136bfc6009e81b36fe1e60/plugins/power/gsd-power-manager.c#L2892