How can I remove unused custom Functions I've declared?

How can I remove unused custom Functions I've declared?

Hi all,
I declare all my business logic in custom Functions, then I have 1 point to change if the logic needs to change. Anyway, I've built up a lot of these functions, and some I no longer need and they are cluttering up my lists...

This being said, how the heck do you delete custom Functions you no longer need?

Thanks kinly

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