[v11.0.x] XY Chart: Prevent crash when deleting a series

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[v11.0.x] XY Chart: Prevent crash when deleting a series #87357

Closed grafana-delivery-bot[bot] closed 2 weeks ago

grafana-delivery-bot[bot] commented 2 weeks ago

Backport 7bcda34b55dd5166219f3cd6fa134330085676ca from #87356

https://github.com/grafana/grafana/assets/88068998/6a645f14-cc1f-475d-9eb8-fa1b6243cf49

Fixes https://github.com/grafana/grafana/issues/85036

Special notes for your reviewer:

Please check that:

[ ] It works as expected from a user's perspective.
[ ] If this is a pre-GA feature, it is behind a feature toggle.
[ ] The docs are updated, and if this is a notable improvement, it's added to our What's New doc.