Backport of "avviddec: Remove vc1/wmv3 override" into 1.20
Backport of !2052 (merged) "avviddec: Remove vc1/wmv3 override".
Commits:
- be1b31b5 avviddec: Remove vc1/wmv3 override
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Backport of !2052 (merged) "avviddec: Remove vc1/wmv3 override".
Commits: