EOL for Qt Plug-ins in CDT 11

[jonahgraham]

For a while now the Qt plug-ins have had at least some issues. They rely on the Nashorn script engine which was removed in Java 15. In theory, before CDT 11 someone could have been using the Qt plug-ins with Java 11 still, even though the packaged Eclipse for C/C++ Developers has been on Java >=15 for ~2 years.

We did a workaround to make the error non-fatal in 2020 when Java 15 came out. I don't know how much of the rest of the Qt features are usable/relevant without the Nashorn script engine.

The last feature/bugfix commit of relevance on Qt was b9c9c44 3+ years ago, but the last real work was back in 2017. Qt was one of Doug's projects, I don't know if QNX/Blackberry relied on it.

Going forward now that we have upped the requirement to Java 17 (in #80) we have to decide what to do about Qt going forward.

[jonahgraham]

I had forgotten that I spoke with Blackberry folk (specifically @elaskavaia) a couple of years ago to make sure they weren't special to Blackberry and she confirmed that it was Doug's pet project.

Therefore as they are not working I am going to move ahead with the deletion and have announced that on cdt-dev.

[jonahgraham]

I had forgotten that I spoke with Blackberry folk (specifically @elaskavaia) a couple of years ago to make sure they weren't special to Blackberry and she confirmed that it was Doug's pet project.

Confirmed on the record now - Thanks!