cleanup: remove unused imports

Merge with stable

subrepo: use [0-9] instead of [\d] in svn subrepo regex The \d was used in a normal (not raw) string and was only passed through to re.search because Python does not define that escape character itself. Using 0-9 makes it clearer what is happening.

webcommands: remove unncessary access to repo.changelog changectx are good enough in these cases and their interface is more stable.

archival: do not use repo.changelog directly

repair: pass variable explicitely to nested function