Remove unused reference

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ecbf68..edeebc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -128,7 +128,6 @@
 [#635]: https://github.com/linebender/vello/pull/635
 [#641]: https://github.com/linebender/vello/pull/641
 [#657]: https://github.com/linebender/vello/pull/657
-[#693]: https://github.com/linebender/vello/pull/693
 
 <!-- Note that this still comparing against 0.2.0, because 0.2.1 is a cherry-picked patch -->
 [Unreleased]: https://github.com/linebender/vello/compare/v0.2.0...HEAD