zope4: HelpSys has been removed from Zope.

For now, remove it completely. If necessary `registerHelp()` can be used.

  commit f3ab4409bfa9a3e1943099c8ae391a2f0273b53b
  Date:   Sat Jul 2 18:26:53 2011 +0000
    Removed the old help system, in favor of the current Sphinx documentation
    hosted at http://docs.zope.org/zope2/. For backwards compatibility the
    `registerHelp` and `registerHelpTitle` methods are still available on the
    ProductContext used during the `initialize` function.

product/Formulator/FieldHelpTopic.py

-from App.special_dtml import DTMLFile
-from HelpSys import HelpTopic
-
-class FieldHelpTopic(HelpTopic.HelpTopic):
-    """A special help topic for fields.
-    """
-    meta_type = 'Help Topic'
-
-    def __init__(self, id, title, field_class,
-                 permissions=None, categories=None):
-        self.id = id
-        self.title = title
-        self.field_class = field_class
-
-        if permissions is not None:
-            self.permissions = permissions
-        if categories is not None:
-            self.categories = categories
-
-    index_html = DTMLFile('dtml/FieldHelpTopic', globals())
-
-    def SearchableText(self):
-        """Full text of the Help Topic, for indexing purposes."""
-        return "" # return self.index_html()
-
-    def get_groups(self):
-        """Get form groups of this field.
-        """
-        return self.field_class.form.get_groups()
-
-    def get_fields_in_group(self, group):
-        """Get the fields in the group.
-        """
-        return self.field_class.form.get_fields_in_group(group)
-

product/Formulator/FieldRegistry.py

@@ -2,7 +2,6 @@ from __future__ import absolute_import
 import os
 import OFS
 from App.ImageFile import ImageFile
-from .FieldHelpTopic import FieldHelpTopic
 
 class FieldRegistry:
     """A registry of fields, maintaining a dictionary with