PDFDebugger isn't needed in tika but it is a dependency in pdfbox-tools (because that one contains the command line interface, which calls the PDFBox command line tools).
Thus I suggest that the tika parser pom be changed like this:
This saves you 200KB in tika-app. That's not much, but every weight loss counts
It should also be possible to get it removed from tika-bundle, but I don't know how to remove it properly. Just removing it from "Embed-Dependency" isn't enough.