Revert "bidir: fix for context decision for mv block split pattern."
Revert "bidir: fix for context decision for mv block split pattern."

This reverts commit 5c3ae64857301e44292044590f030af6a9f025ae.

jmvalin/daala,xiphmont/daala,HeadhunterXamd/daala,KyleSiefring/daala,xiphmont/daala,ycho/daala,HeadhunterXamd/daala,HeadhunterXamd/daala,xiph/daala,luctrudeau/daala,jmvalin/daala,xiphmont/daala,luctrudeau/daala,xiph/daala,HeadhunterXamd/daala,ycho/daala,KyleSiefring/daala,ycho/daala,xiphmont/daala,xiph/daala,ycho/daala,luctrudeau/daala,KyleSiefring/daala,xiphmont/daala,HeadhunterXamd/daala,jmvalin/daala,ycho/daala,jmvalin/daala,jmvalin/daala,luctrudeau/daala,xiph/daala,KyleSiefring/daala,luctrudeau/daala,xiph/daala,KyleSiefring/daala