gallium: Remove s3tc enablement leftovers
This part has been removed from Mesa since commit 3a8a5e77e8f992aaa3539e060885138c2fcddad1 as the patent expired in 2017.
Signed-off-by: Corentin Noël corentin.noel@collabora.com
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This part has been removed from Mesa since commit 3a8a5e77e8f992aaa3539e060885138c2fcddad1 as the patent expired in 2017.
Signed-off-by: Corentin Noël corentin.noel@collabora.com