No way to remove deadline using `edit_task`

[nus-pe-bot]

If I want to remove a task that already has a deadline, but I do not want to change any other details, I cannot simply do something like edit_task 1 dl/. The only way to unset a deadline is to delete the task and add it again, which poses inconvenience to users.

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_{[original: nus-cs2103-AY2223S1/pe-interim#5723] [original labels: type.FeatureFlaw severity.Low]}

[peppapighs]

Team's Response

Thank you for catching this bug.

Duplicate status (if any):

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