Revert "data: add X-GDM-NeedsVT=true to wayland xsession file"

This reverts commit 16204920178d80c412c15230c26cf3cd8078a42f.

The latest cut of wayland support in GDM doesn't have X-GDM-NeedsVT,
it just "does the right thing" for files in /usr/share/wayland-sessions
(versus files in /usr/share/xsessions)
NEWS: update for release
configure: bump to 3.11.92