Michael Catanzaro authored Feb 24, 2021 and Jan-Michael Brummer committed Apr 05, 2021

Apparently, when running under X11 it is possible to tell GTK to restore
particular windows on particular workspaces. That's cute, but I don't
like X11-specific code, and it's gone in GTK 4. We'll have to remove
this in the future no matter what, so might as well get rid of it now.