Use refactoring API to delete converted dependencies

As a follow up on JBIDE-12527 and JBIDE-8973, we should be able to also delete all the jars from the project that have been converted to maven dependencies. A simple file.delete() doesn't work currently has the files are locked (on windows at least).

When manually deleting jars that are referenced in the classpath, eclipse (jdt) displays a refactoring dialog and the file deletion is working. We should take a look at how that approach is working