RFR: 8269259: Remove obsolete apps, tests, and scripts

[Nir Lisker]

On Fri, 25 Jun 2021 14:59:00 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> This PR deletes the following applications, tests, and scripts that are either obsolete 
> or unmaintained:
> 
> apps/performance/*
> 
> apps/tests/HelloTest
> 
> apps/toys/FXSlideShow
> apps/toys/Industrial
> apps/toys/Shape3DToy
> apps/toys/StretchyGrid
> apps/toys/TouchSuite
> 
> tests/functional/*
> tests/performance/VMPerformance
> 
> tools/*
> 
> See the JBS issue and [this thread](https://mail.openjdk.java.net/pipermail/openjfx-dev/2021-June/030894.html) on the openjfx-dev mailing list for more info.
> 
> There are two commits for ease of review. The first one is generated by doing a "git rm -r" on each of the above listed directories. The second is to remove any remaining references to the removed directories.

Looks fine. I don't know which of these are used frequently and which aren't, but I tested that there are no errors as a result of this patch.

Under tests/system/src there are several projects called "testappN". Are they named cryptically on purpose?

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Marked as reviewed by nlisker (Reviewer).

PR: https://git.openjdk.java.net/jfx/pull/545