Remove obsolete doc reference.
Remove obsolete doc reference.

svn path=/trunk/ogg/; revision=9371

brion/ogg,felipebetancur/ogg,mwgoldsmith/ogg,nicolaichuk/ogg,felipebetancur/ogg,emscripten-ports/Ogg,youfearm3/ogg,xiph/ogg,mwgoldsmith/ogg,ksophocleous/ogg,youfearm3/ogg,eidy/libogg,brion/ogg,emscripten-ports/Ogg,ShiftMediaProject/ogg,nicolaichuk/ogg,xiph/ogg,eidy/libogg,ksophocleous/ogg,ShiftMediaProject/ogg