Remove Java Buildpack Dependencies from Blobstore

This change removes the Java Buildpack dependencies from the blobstore.  The new "offline" design used by the buildpack means that these dependencies are no longer needed.

The removal of these dependencies shrinks the blobstore by ~583 MB.

# NOTES
* This change has backwards compatibility implications.  Any buildpack created (or modified) by a customer that depends on these artifacts will break after they are removed.
* There is no rush to incorporate this change into the code base.  It can wait until after any pressing releases.

[#70160258]