Cannot delete a remote with multiple fetch refspecs

Steps to reproduce:

>>> import pygit2
>>> repo = pygit2.init_repository(".")
>>> repo.remotes.create("origin", "https://github.com/libgit2/pygit2.git")
>>> repo.remotes.add_fetch("origin", "refs/heads/master:refs/remotes/origin/master")
>>> repo.remotes.add_fetch("origin", "refs/tags/*:refs/tags/*")
>>> repo.remotes.delete("origin")
_pygit2.GitError, entry is not unique due to being a multivar

This is present in the latest release and I also saw it happen (though with different error text) in 0.27

There doesn't appear to be a viable workaround because the libgit2 function for deleting multivars in the config isn't exposed in pygit2. Otherwise I would have tried to remove the multiple fetch entries directly ahead of time and then delete the remote.

Commencez par reproduire le snippet pygit2 fourni et examinez la gestion de la suppression des remotes et de la configuration exposée par pygit2. Le correctif est terminé lorsque la suppression d’un remote avec plusieurs refspecs de fetch réussit sans l’erreur multivar, avec un test de régression couvrant l’exemple.