LeetCode #237 — Delete Node in a Linked List

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LeetCode’s challenge of June 2, 2020 (#237) asks us to delete a Node from a LinkedList. The tricky part is that we only have access to the Node itself, not to the head or parent Node.

Given the Node 5, as part of the LinkedList (4->5->1->9), we're expected to return (4->1->9) with the Node 5 cut out of the list.