RFR: 8259864: Cleanup unused Prism files

Sat Jan 16 21:32:30 UTC 2021

On Sat, 16 Jan 2021 21:22:21 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Fix for JDK-8259864
>> Remove java and native files that are not used/maintained in prism configurations.
>
> There are references to `eglx11` and `eglfb` in some of the `buildSrc/*.gradle` files. I recommend cleaning those up, too.

I also see references in `ES2Pipeline.java`, `GLFactory.java` and `PrismES2Defs.h`. Should those be removed, too?

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PR: https://git.openjdk.java.net/jfx/pull/378