Remove ambiguous line from group permissions table

What does this MR do?

As described at: #353677 (comment 906259482), there's only one known way to view usage quota data, and the permissions for that are accurately reflected in the second lines that deals with the topic.

There might be another feature with different permissions, but it won't be obvious what that is in the current state.

We can remove this entry to avoid ambiguity, and restore if necessary with more information in the future if necessary.

Author's checklist

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• ~"frontend"
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These labels cause the MR to be added to code verification QA issues.

Reviewer's checklist

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