documents: Silence a CRITICAL when querying a feed of entries
documents: Silence a CRITICAL when querying a feed of entries

Querying a feed of Drive entries using Drive v2 leads to:
  CRITICAL **: _gdata_query_set_next_uri: assertion
    'self->priv->pagination_type == GDATA_QUERY_PAGINATION_URIS'
    failed

When the support for pagination using page tokens was landed in
commit 38b934a9ef9dab89, the code in GDataDocumentsService::parse_feed
that added the next and previous URIs from the feed to the GDataQuery
was generalized and moved to GDataService::parse_feed, and
GDataDocumentsQuery was set to use pagination tokens.

The intention was to use pagination tokens for GDataDocuments* using
only the generic parsing code in the base classes.

However, the code in GDataDocumentsFeed::parse_json that added the
GDataLinks for the next URI to the feed wasn't removed. This tricks
GDataService::parse_feed into using pagination URIs with the
corresponding query.

This reverts commit fa3e219eff1d4617463a86deb14cb3b1f5fb9a19.

https://bugzilla.gnome.org/show_bug.cgi?id=684920

pwithnall/libgdata,pwithnall/libgdata,GNOME/libgdata