Re: Remove it or leave it?
Sugar or sugar blocks directly on or just above the frames( ie candy board facing down or screen basket) is much better. Cluster can readily access it.
If sugar is on the top side of an inner cover, bees and cluster may not access it in cold temps.
Lost a healthy hive that got stranded with no honey in immediate area yet had 20 lbs of sugar above an inner cover with a 3 1/2 round hole in the center of it.
Zone 3b. If you always do what you always did, you'll always get what you always got!