You should be able to. What happens when you try?
Why can't I remove friends on Chess.com?
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Jun 8, 2017
0
#3
I've removed everyone I don't know and don't talk to any more - it says I have 6 but there are still 10+ people on my list. .-.
Jun 9, 2017
0
#4
I see you have 5 friends and 6 followers. May be just a cache issue on your end.
Is it a bug?