b2: ignore already_hidden error on remove
b2: ignore already_hidden error on remove

Sometimes (possibly through eventual consistency) b2 returns an
already_hidden error on a delete.  Ignore this since it is harmless.

ncw/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,B4dM4n/rclone,olihey/rclone,B4dM4n/rclone,olihey/rclone,ncw/rclone,olihey/rclone,B4dM4n/rclone,olihey/rclone