[frogr] Remove po/Makevars

[Piotr Drąg <piotrdrag src gnome org>]

commit 627f8d024eaba244862cc3d75b198f7d26768001
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Fri Jan 26 16:59:36 2018 +0100

    Remove po/Makevars
    
    Damned Lies should be able to handle our po/meson.build now,
    so this workaround is no longer needed.

 po/Makevars |   78 -----------------------------------------------------------
 1 files changed, 0 insertions(+), 78 deletions(-)