SodaRecordMixin no longer will accept a datalink#links endpoint for soda.

It is unclear why it ever did this, as I really do not see how this would
ever have a beneficial effect (the only parameter understood by both links and
SODA is ID, and even that is interpreted in totally different ways).  It
has, however, a detrimental effect; see bug #578.

Author: msdemlei

pyvo/dal/adhoc.py

@@ -671,13 +671,6 @@ def _get_soda_resource(self):
         except DALServiceError:
             pass
 
-        # let it count as soda resource
-        try:
-            return self._results.get_adhocservice_by_ivoid(
-                "ivo://ivoa.net/std/datalink#links")
-        except DALServiceError:
-            pass
-
         dataformat = self.getdataformat()
         if dataformat is None:
             raise DALServiceError(