suppress or fix warnings in generated code

[rzpt]

What happened?

There are warnings in eclipse on generated code. I tried to suppress them in https://github.com/palantir/gradle-conjure/pull/951 but if we can suppress them at the source, that would be great.

All methods in a class DefaultBuilder implements Builder seem to be missing @Override These can be unused: _plainSerDe on Async and Blocking classes. UndertowRuntime runtime on an Endpoint.

There may be more, but I am currently working on a very small project with only these warnings.

What did you want to happen?

No warnings in eclipse on generated code.