Remove (duplicated) external displays handling
Submitted by Ben Wolsieffer
Currently, gnome-settings-manager creates a systemd inhibitor that block suspending when the laptop lid is closed if multiple displays are attached. Since gnome no longer manages the lid switch, but instead lets systemd do it, gnome should not create this inhibitor. Also, the inhibitor is redundant, because systemd already prevents lid switch suspension if an external display or docking station is attached.