Drop field repository
We had this discussion some time ago on Slack. It seems that we decided, that we drop the field "repository" and instead use the property "repository-url". @sotiris.karampatakis can you confirm this decision (looking into the database it shows me, that you are already using only the property "repository-url" in your ingest)? If so, @mkozak can you then drop the field "repository" (I think you need also to change the initial population, as there the field repository is used)