Cleanup types from EuiMarkdown

[stephmilovic]

We are needing to do some funky typecasting for the EuiMarkdown processingPlugins, see this commit. @chandlerprall said if I make a ticket, Eui team will cleanup. 🙏 😉

[thompsongl]

Hey @stephmilovic, I don't see any type errors when I remove the casting in that (now refactored) file.
No errors in EUI when attempting to replicate either.

[stephmilovic]

hm, strange. i just confirmed and you're right. closing 🍾

[stephmilovic]

@thompsongl wait i found it sorry. On the cases_rac_ui branch in Kibana (in a PR against master now). If you comment out the typecast here you will see the error: https://github.com/elastic/kibana/blob/cases_rac_ui/x-pack/plugins/cases/public/components/markdown_editor/use_plugins.ts#L23

[thompsongl]

Ah yep; I see it now. "Exported variable has or is using name from external module but cannot be named"