The ungroupedlist api parameter will be deprecated from the wbgetentities
and wbgetclaims modules on Wikidata as of the next deployment on Wednesday
29th July.
The parameter has very low usage and removing it removes code complexity in
the API.
Phabricatior - https://phabricator.wikimedia.org/T106863
Deprecation change - https://gerrit.wikimedia.org/r/225903
Removal change - https://gerrit.wikimedia.org/r/226643
To adjust for this change users of the API simply have to use the default
format, which is grouped by property ID.
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