please remove "no available" on Final Review status page

[alicerusso]

"(no available)" reads oddly on Final Review status pages, under "Date Approved". (Example: https://queue.rfc-editor.org/final-review/rfc9955/)

After discussion, the RPC requests that these cells be empty (completely blank). If that's not an option, then we request "none".

queue/website/app/components/FinalReviewDraftApprovalStatus.vue

Line 105 in f1bbced

return h('i', '(no available)')

Similarly we prefer the same -- blank -- instead of "(no comment)" in the "Approver Comment" column.

queue/website/app/components/FinalReviewDraftApprovalStatus.vue

Line 79 in f1bbced

return value ? h(Linkify, { html: value }) : h('i', '(no comment)')