Remove alternative title from volumes

[acka47]

Currently, volumes don't have a title (see #498 ) but many have otherTitleInformation from field 331 resp. 333 (see current morph, lines 473-475. This actually is the additional title information from the superordinated resource and, thus, should be removed from the volumes.

Example http://lobid.org/resource/HT017261040/about (snippet):

{
    "@id" : "http://lobid.org/resource/HT017261040",
    "@type" : [ "http://purl.org/dc/terms/BibliographicResource", "http://purl.org/ontology/bibo/Book" ],
    "otherTitleInformation" : "deutschsprachige Fotobücher 1918 bis 1945"
}

Source:

<datafield tag="331" ind1="-" ind2="2">
  <subfield code="a">Autopsie</subfield>
</datafield>
<datafield tag="335" ind1="-" ind2="2">
  <subfield code="a">deutschsprachige Fotobücher 1918 bis 1945</subfield>
</datafield>

[dr0i]

Deployed to staging. Mind that with resolving #498 volumes now have a title.

[acka47]

+1

[dr0i]

Deployed to production, closing.