If all postinsts have already been run during rootfs construction then
there's no point in having run-postinsts in the installed system.
Clean it up at the same time that update-rc.d and suchlike are being
removed.
(From OE-Core rev: b260cf9fbeb6f029c1ce45e77edd03968caa8288)
Signed-off-by: Phil Blundell <pb@pbcl.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>