RFR: 8307244: Remove redundant class RMIIIOPServerImpl

[Serguei Spitsyn]

On Tue, 2 May 2023 17:57:14 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

> Removal of class, looks like it was missed in the JDK9 removal of RMIIIOP.
> This class is not referenced by other classes or tests.

As I see, this transport was deprecated for some time.
But it is not clear in what release.
The fix looks good to me.
Thanks,
Serguei

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Marked as reviewed by sspitsyn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13758#pullrequestreview-1409689868