With bzr.dev revno 6460, rmbranch doesn't remove the branch, just the asterisk:
$ bzr branches
first-colo-branch
* second-colo-branch
$ bzr switch first-colo-branch
Tree is up to date at revision 0.
Switched to branch: /home/abentley/sandbox/foo/
$ bzr rmbranch second-colo-branch
$ bzr branches
first-colo-branch
second-colo-branch
With bzr.dev revno 6460, rmbranch doesn't remove the branch, just the asterisk:
$ bzr branches sandbox/ foo/ colo-branch
first-colo-branch
* second-colo-branch
$ bzr switch first-colo-branch
Tree is up to date at revision 0.
Switched to branch: /home/abentley/
$ bzr rmbranch second-colo-branch
$ bzr branches
first-colo-branch
second-