libvpx: Drop some dead code
libvpx: Drop some dead code

jackjansen/cerbero,EricssonResearch/cerbero,flexVDI/cerbero,jackjansen/cerbero,jackjansen/cerbero,shoreflyer/cerbero,ikonst/cerbero,ramaxlo/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ramaxlo/cerbero,EricssonResearch/cerbero,fluendo/cerbero,EricssonResearch/cerbero,ikonst/cerbero,centricular/cerbero,ramaxlo/cerbero,AlertMe/cerbero,multipath-rtp/cerbero,ford-prefect/cerbero,multipath-rtp/cerbero,multipath-rtp/cerbero,nzjrs/cerbero,centricular/cerbero,lubosz/cerbero,nirbheek/cerbero,sdroege/cerbero,fluendo/cerbero,superdump/cerbero,flexVDI/cerbero,justinjoy/cerbero,sdroege/cerbero,ramaxlo/cerbero,GStreamer/cerbero,nirbheek/cerbero-old,ford-prefect/cerbero,ikonst/cerbero,EricssonResearch/cerbero,OptoFidelity/cerbero,nirbheek/cerbero-old,lubosz/cerbero,GStreamer/cerbero,centricular/cerbero,lubosz/cerbero,shoreflyer/cerbero,ford-prefect/cerbero,AlertMe/cerbero,ramaxlo/cerbero,ikonst/cerbero,OptoFidelity/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,fluendo/cerbero,atsushieno/cerbero,sdroege/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,atsushieno/cerbero,justinjoy/cerbero,OptoFidelity/cerbero,ford-prefect/cerbero,shoreflyer/cerbero,atsushieno/cerbero,jackjansen/cerbero,sdroege/cerbero,justinjoy/cerbero,flexVDI/cerbero,nirbheek/cerbero-old,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,GStreamer/cerbero,superdump/cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,lubosz/cerbero,nirbheek/cerbero,flexVDI/cerbero,nirbheek/cerbero-old,superdump/cerbero,nzjrs/cerbero,nirbheek/cerbero,fluendo/cerbero,AlertMe/cerbero,fluendo/cerbero,shoreflyer/cerbero,AlertMe/cerbero,atsushieno/cerbero,centricular/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,justinjoy/cerbero,ikonst/cerbero,GStreamer/cerbero,multipath-rtp/cerbero,GStreamer/cerbero,shoreflyer/cerbero,centricular/cerbero,sdroege/cerbero,nzjrs/cerbero,nzjrs/cerbero,superdump/cerbero,multipath-rtp/cerbero,OptoFidelity/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,AlertMe/cerbero