oss: Remove unused error handling of qemu_set_fd_handler
The function cannot fail, so the check is superfluous. Signed-off-by: NFam Zheng <famz@redhat.com> Message-id: 1433400324-7358-11-git-send-email-famz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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