RFR: 8344149: Remove usage of Security Manager from java.rmi

[Aleksei Efimov]

On Fri, 15 Nov 2024 01:12:34 GMT, Stuart Marks <smarks at openjdk.org> wrote:

> First cut at removal of Security Manager stuff from RMI.
> 
> This covers just about every SM-related case in RMI, except for a bit of package checking in MarshalInputStream. This will be handled separately. It's covered by [JDK-8344329](https://bugs.openjdk.org/browse/JDK-8344329).
> 
> Further simplifications could be done in RuntimeUtil and NewThreadAction. However, those changes started to become somewhat more intrusive than I'd like for this PR, which is focused on removing security-related stuff.

Marked as reviewed by aefimov (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22129#pullrequestreview-2443368454