GtkFileChooser: Remove the last remains of the last_folder_uri logic
GtkFileChooser: Remove the last remains of the last_folder_uri logic

This is akin to commit cfb09e565460fd463a0822c8c8dbb0521d9fcab9 in the gtk-2-24 branch;
the last_folder_uri is no longer being used for anything meaningful, so we
remove it altogether.

Signed-off-by: Federico Mena Quintero <4999915a961edfd7686112c2935288e1266eae14@gnome.org>

ahodesuka/gtk,jadahl/gtk,ahodesuka/gtk,davidt/gtk,alexlarsson/gtk,msteinert/gtk,jessevdk/gtk,ebassi/gtk,ebassi/gtk,grubersjoe/adwaita,jessevdk/gtk,grubersjoe/adwaita,alexlarsson/gtk,Lyude/gtk-,grubersjoe/adwaita,alexlarsson/gtk,ahodesuka/gtk,davidt/gtk,Adamovskiy/gtk,jadahl/gtk,Distrotech/gtk2,jadahl/gtk,davidgumberg/gtk,grubersjoe/adwaita,Lyude/gtk-,bratsche/gtk-,davidt/gtk,Lyude/gtk-,grubersjoe/adwaita,davidgumberg/gtk,Sidnioulz/SandboxGtk,davidt/gtk,alexlarsson/gtk,chergert/gtk,msteinert/gtk,davidgumberg/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,grubersjoe/adwaita,jigpu/gtk,ahodesuka/gtk,Sidnioulz/SandboxGtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,chergert/gtk,ebassi/gtk,jessevdk/gtk,alexlarsson/gtk,jadahl/gtk,davidgumberg/gtk,jigpu/gtk,chergert/gtk,grubersjoe/adwaita,Adamovskiy/gtk,Lyude/gtk-,davidt/gtk,bratsche/gtk-,Distrotech/gtk2,Adamovskiy/gtk,chergert/gtk,Distrotech/gtk2,davidt/gtk,msteinert/gtk,Distrotech/gtk2,jigpu/gtk,chergert/gtk,Adamovskiy/gtk,jadahl/gtk,msteinert/gtk,ebassi/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,jadahl/gtk,ebassi/gtk,ebassi/gtk,jigpu/gtk,chergert/gtk,Lyude/gtk-,davidgumberg/gtk,jessevdk/gtk,msteinert/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,jigpu/gtk,bratsche/gtk-,Lyude/gtk-,jigpu/gtk,ahodesuka/gtk,grubersjoe/adwaita,bratsche/gtk-,bratsche/gtk-,Adamovskiy/gtk,jessevdk/gtk,jigpu/gtk,Adamovskiy/gtk,Adamovskiy/gtk,jessevdk/gtk,Lyude/gtk-,davidgumberg/gtk,jigpu/gtk,alexlarsson/gtk,ahodesuka/gtk,Lyude/gtk-,msteinert/gtk,Distrotech/gtk2,Distrotech/gtk2,davidgumberg/gtk,davidgumberg/gtk,Adamovskiy/gtk,bratsche/gtk-,jadahl/gtk,jessevdk/gtk,chergert/gtk,ahodesuka/gtk,chergert/gtk