Bug#853258: docker.io: uses sleep to query user in maintainer script

[Petter Reinholdtsen]

Control: notfixed -1 1.13.1~ds1-2

Removing incorrectly fixed flag.  The problem still exist in
/var/lib/docker/nuke-graph-directory.sh, according to the
email thread.

-- 
Happy hacking
Petter Reinholdtsen