item_comment no longer appears to be used.

[jcoyne]

requests_with_item_comment = Request.select { |req| req.data['item_comment'] }
 =>
[#<MediatedPage:0x00007f7018f8e078
...
requests_with_item_comment.count
 => 318
Request.count
 => 40564
 requests_with_item_comment.max_by { |req| req.created_at }.created_at
 => Fri, 04 Nov 2022 11:52:38.000000000 PDT -07:00

grouped = requests_with_item_comment.group_by(&:approval_status)
grouped.keys
 => ["approved", "marked_as_done"]

[cbeer]

Ticket to come, but we'll be bringing back item comments for SAL-NEWARK material (post FOLIO? 🤞 ) so there's no sense removing or remediating it now.

[saseestone]

Ticket describing SAL-NEWARK work: #1568