Remove the com.google.protobuf bundle from the feature and the category

[merks]

• There are no uses of the one Java package this bundle provides

[merks]

There appear to be no bundles actually using this bundle. There is only the inclusion by a feature:

[nitind]

Blocked by Issue #2, as until the repo can build cleanly, no new version will go into our CI builds and flow into SimRel.