remove keywords field, it will be provided by subclasses

setup.py

@@ -48,7 +48,6 @@ setup(name='collective.dms.basecontent',
           'z3c.blobfile',
           'plone.app.relationfield',
           'plone.formwidget.contenttree',
-          'collective.dms.thesaurus',
       ],
       extras_require={
           'test': ['plone.app.testing',

src/collective/dms/basecontent/dmsdocument.py

@@ -7,7 +7,6 @@ from plone.dexterity.schema import DexteritySchemaPolicy
 from plone.supermodel import model
 from five import grok
 from collective.dms.basecontent.relateddocs import RelatedDocs
-from collective.dms.thesaurus.field import ThesaurusKeywords
 
 from . import _
 from ._field import LocalRolesToPrincipals
@@ -42,9 +41,6 @@ class IDmsDocument(model.Schema):
         required=False,
         display_backrefs=True)
 
-    administrative_keywords = ThesaurusKeywords(
-        title=_(u"Administrative Keywords"),
-        required=False)
 
 
 class DmsDocument(Container):