[aur-general] Removal request

Maybe someone can delete cairo-dock-svn, cairo-dock-themes-svn, and cairo-dock-plugins-svn, because they switched to git a while ago, so this package isn't useful anymore. And also, remove openanno-svn from the AUR, the project's name changed and is now named "Unknown Horizons", so there is a new and up to date package unknown-horizons-svn. Thanks in advance.