I18n: Update translation fr (100%).

70 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation fr (100%).

70 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
Use IT_PROG_INTLTOOL([0.35.0]) instead of AC_PROG_INTLTOOL
Remove unused variable to avoid breaking builds