How do I clean up completely after SVN -> Git migration?

Question

I've migrated a repo from SVN to Git using svn2git and am happy with everything apart from one thing. How can I remove the remotes/svn/trunk branch that shows in git branch -a:

$ git branch -a
* master
  remotes/origin/master
  remotes/svn/trunk

I cleaned up after svn2git by doing the following:

git config --remove-section svn-remote.svn
git config --remove-section svn
rm -rf .git/svn

But I still have the remotes/svn/trunk sitting there! I get this if I grep the .git directory for svn:

$ grep -R svn .git
.git/info/refs:e6dd7a08d86d9b0944891755602b25ce12d30bb0 refs/remotes/svn/trunk
Binary file .git/objects/pack/pack-10cdd522d8f0fcc9b30efeddbdad3d0281c1e6da.pack matches
.git/packed-refs:e6dd7a08d86d9b0944891755602b25ce12d30bb0 refs/remotes/svn/trunk

Am I safe to go into those files and remove the references or is there a cleaner way to get rid of that old cruft?

Answer 1

Deleting the remote tracking branch would be a good start:

git branch -d -r svn/trunk

Other advices are available at "How do you stop tracking a remote branch in git?".
But to really clean, you may have to do other operations (based on git gc for instance) as mentioned in "How to remove unreferenced blobs from my git repo".