NSGeneralPboard, NSFontPboard, NSRulerPboard, NSFindPboard and NSDragPboard were all deprecated in macOS 10.13. We should use the latest API.
rdar://95716307
Pull request: https://github.com/WebKit/WebKit/pull/1708
Committed 251834@main (c28bb7beb9af): <https://commits.webkit.org/251834@main> Reviewed commits have been landed. Closing PR #1708 and removing active labels.