If you decide that you no longer want to focus on a skill that you’ve selected, click on the skill’s 3-dot menu, then click “Cancel skill goal”. A dialogue box will pop up asking you to confirm the decision.

A skill card's 3-dot menu open in the "Skill plan" board. The card is "Teaching customers how to use your services", tagged "Fluency", and the purple "ACTIONS" menu over it lists "Add post", "Add emoji", "Remove to Skills", "Add to a Board", "Go to", then, below a divider, "Request endorsement" and — highlighted, and the only item in red — "Cancel skill goal". The card carries its own large "CANCEL SKILL GOAL" button along the bottom too, so the destructive step and its neighbour "Request endorsement" sit one line apart in the same menu.