/usr/share/gnome/applications/display.im6.desktop is in ubuntu-gnome-default-settings 16.04.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [Desktop Entry]
Exec=/usr/bin/display.im6 %f
Type=Application
NoDisplay=true
|