Revert "VP9: Synthesize CSD from frame header"

Revert submission 2953128-vp9_csd_synthesis

Reason for revert: Causes test failures (b/331169933)

Reverted changes: /q/submissionid:2953128-vp9_csd_synthesis

Change-Id: I07969e9911d93ff9e4877c95a7840f356db786b4
4 files changed