There should be a garbage bin and an outdoor toilet somewhere near Kitiffik. Here's the source:

Katiffik
Sleeps: 6 (max)
GPS: 66.920334 -51.360867
Features:
    Small bench for cooking
    Garbage bin
    Outdoor dry toilet
    Great view of Amitsorsuaq Lake
    Look for canoes here

(Source: arcticcircletrail.gl/hiking/on-the-trail/act-huts/)