Revert "st/dri: Fix dangling pointer to a destroyed dri_drawable"
This reverts commit dab02dea. It causes crashes of qtcreator and firefox. Fixes: dab02dea "st/dri: Fix dangling pointer to a destroyed dri_drawable" Cc: 18.0 18.1 <mesa-stable@lists.freedesktop.org> (cherry picked from commit 4559aefb)