turnip: Remove _mesa_locale_init/fini calls.

The resulting locale is not used for Vulkan, and it is not reference
counted, giving issues when multiple instances are created.

CC: 19.2 19.3 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
(cherry picked from commit 72f858fc)