RFR: 8297041: Remove the last remnants of sjavac

[Erik Joelsson]

On Wed, 16 Nov 2022 13:22:43 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> The sjavac ("smart javac") was an ambitious project. It should parallelize java compilation, create a background daemon process that kept the JVM "hot" with the JITted javac code, define a public api so only noticeable changes in a class caused further dependency compilations, etc etc.
> 
> Some of this never came to fruition. Other were implemented differently, as the `depend` plugin. The only thing we're currently using (and have been for the last few years) is the "server" functionality, that is, the ability to keep a single JVM process alive, and reuse the JITted code.
> 
> This code does not belong in the jdk.compiler module. It is a buildtool, pure and simple. Let's move it to it's proper place.

Marked as reviewed by erikj (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/11185