Revert "st/mesa: expose 0 shader binary formats for compat profiles for Qt"

This reverts commit 55376cb3.

It's been over a year and both QT 5.9.5 and 5.11.0 contained a fix for the
original issue. It seems i965 only ever applied this workaround to the
18.0 branch.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
(cherry picked from commit 11e16ca7)