RFR: 8344112: Remove code to support security manager execution mode from DatagramChannel implementation

[Alan Bateman]

On Wed, 13 Nov 2024 15:16:02 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Not this PR but there is a follow-up coming that will drop the dependency on DatagramPacket from DatagramChannelImpl so that it does back to the adaptor.
>
> OK - if you have follow-ups in the pipe to fix this then good to go!

Yes, there will be a follow-up from JEP 491 so that we can go back to using synchronization in the adaptor send/receive methods. I initially had everything in one patch but it's large so decided to split it and address the SM removal first.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22072#discussion_r1840814042