1. The commit[1] added the "attach_detach_conventions_v2" doc file,
but it missed to be shown in the index.
2. The commit[2] removed "database_architecture" and "oslo-middleware"
files from doc. So we should remove them from the index as well.
[1]: Ie15233c99d91de67279b56d27a5508c5ea98d769
[2]: I145464d0d63cb5a00e0e905083c260fb6621dd89
Change-Id: I077a9d522eee06c864f1458878a794548ed93584
9df0bce1d0