Convert the document type list, create, edit and delete views to CBV. Remove unused DocumentTypeForm.

mayan/apps/documents/forms.py

@@ -95,15 +95,6 @@ class PrintForm(forms.Form):
     page_range = forms.CharField(label=_('Page range'), required=False)
 
 
-class DocumentTypeForm(forms.ModelForm):
-    """
-    Model class form to create or edit a document type
-    """
-    class Meta:
-        fields = ('label', 'trash_time_period', 'trash_time_unit', 'delete_time_period', 'delete_time_unit')
-        model = DocumentType
-
-
 class DocumentTypeFilenameForm(forms.ModelForm):
     """
     Model class form to edit a document type filename