Task Update - Dataset/Program removal fixed

[ihsaan-ullah]

@ mention of reviewers

@Didayolo

A brief description of the purpose of the changes contained in this PR.

• It was not possible to remove a dataset or program from a task. Now that is fixed in this PR

Issues this PR resolves

• removing dataset from task #1564

A checklist for hand testing

• create a new task and check that you can update scoring, ingestion, input, reference
• check that you cannot remove a scoring program from a task
• check that you can remove ingestion, input and reference from a task

Checklist

• Code review by me
• Hand tested by me
• I'm proud of my work
• Code review by reviewer
• Hand tested by reviewer
• CircleCi tests are passing
• Ready to merge

[Didayolo]

Nice work