Revert "Fix typo"

Since Bitbucket is the only hoster that supports 'deleting' issues, it's written this way. It's not that git-issues can only support this feature on Bitbucket repos, but more about Bitbucket being the only one that's offering it.

This reverts commit e799e47b3065bce2b911c2acb28c1e31eaa89453.