--no-degraded doesn't work

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It seems that --no-degraded and/or incremental assembly does not refuse to start a degraded array if one of the disks shows as being removed already, possibly by an explicit fail/remove at runtime, or manually starting the array without --no-degraded once.

Shouldn't --no-degraded refuse to start a degraded array even if the missing disk already has been removed from the disk table in the superblock?

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