timescale db internal entries in Datasources endpoint

When I currently run https://timeseries.gfz-potsdam.de/tsmdl/api/v1/Datasources I also get entries like timescale:_timescaledb_functions and timescale:_timescaledb_debug.

It doesn't make sense to give those out - and in fact they don't work with the other endpoints of the tsmdl api.