Clean up deprecations from 5.2

Description

We should put this off until the Beta releases (and possibly even into later Betas or CRs) to help encourage people to try 6.0.0 who might be turned off if they have to make changes to even try it.

Also as a mental note for myself I want to try to start identifying deprecations based on which release I made the change in byt writing the @deprecated Javadoc tag as `* @deprecated (5.2) ...` or `* @deprecated (6.0) ...` to denote the version I add the deprecation. That helps identify when a deprecation could potentially be removed.

Environment

None

Assignee

Steve Ebersole

Reporter

Steve Ebersole

Fix versions

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Requires Release Note

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Pull Request

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Priority

Major
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