Remove workaround for ail_list_appinfo_cb type change

AIL change https://review.tizen.org/gerrit/#/c/27621/ has been integrated
into the 20140925.1 daily Tizen IVI release,
so we do not need the alternative code path anymore
Merge pull request #2470 from tiwanek/CLEANUP-2

Remove workaround for ail_list_appinfo_cb type change