Revert "Update show-outstream-video-ads.md for backupOnly renderers (#2259)" (#2289)
Revert "Update show-outstream-video-ads.md for backupOnly renderers (#2259)" (#2289)

This reverts commit 7c48e699f220d6e90aca04388a2022b40aff5089.
prebid/prebid.github.io,prebid/prebid.github.io,prebid/prebid.github.io