block: Remove filename parameter from .bdrv_file_open()
It is unused now in all block drivers. Signed-off-by:Kevin Wolf <kwolf@redhat.com> Reviewed-by:
Eric Blake <eblake@redhat.com>
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It is unused now in all block drivers. Signed-off-by:Kevin Wolf <kwolf@redhat.com> Reviewed-by:
Eric Blake <eblake@redhat.com>