LPS-47563 Methods "DLUtil.getEntries", "DLImpl.getEntries" are not in use anymore

Hi @sergiogonzalez!

This PR is for the **DL** subsystem. Just removing 1 method that references message boards but is not used anywhere, be it Java or JSP. It is in `DLUtil` though, which is public in portal-service. Can you guide me on proper procedure in this case? It seems no one should be using `DL.getEntries` anymore, seeing that even the Portal has abandoned it in favor of the more complete `SearchResultUtil.getSearchResults`. Perhaps it was left behind as an oversight?

cc @marcellustavares @rotty3000 No logic changes.