Remove now unused Apache JXPath dependencies

[HannesWell]

The final step of

• Remove dependencies on org.apache.commons.jxpath eclipse.platform.ui#423

[akurtakov]

Thanks for finishing this one!

[merks]

Looking at the *.aggran editor's Maven tab, all appears to be fine:

This view previews the pom content and resolves dependencies to what's actually available at Maven Central, marking issues with ** so you can find them.

For example, if I remove an important mapping:

we see a problem:

Of course subsequent builds also test this, but nice to know immediately...