Code review comment for lp:~gagern/trac-bzr/bug194277

Quite a lot of code gone in the process. Makes me wonder whether there was really that much unused code in trac-bzr, or whether I missed something. So I'd really like to see at least one Appove vote here if possible. In my opinion http://bazaar.launchpad.net/~trac-bzr-team/trac-bzr/trunk/revision/68 is the commit that renders get_change obsolete and _history_cache along with it.