[admin] Please remove branch from "recent branches"

As noted in question 27789 by project moved from svn to bzr. Before that we had an svn import branch set up here - the import is no longer active but the branch still appears in the recent revisions box here: https://code.launchpad.net/dcplusplus/ - the branch is called "trunk", registered by VCS imports. Better yet would be if the whole branch was removed completely since the real trunk branch we use has all the old one had...