mboximport: remove dead code

mboximport.py

@@ -181,9 +181,6 @@ class MBOXImporter(object):
             encoding = u'ascii'
             if isinstance(data, str):
                 data = unicode(data, encoding)
-            self.cnx.set_shared_data('raw_content_%s_%s' %
-                                     (emaileid, self._part_index + 1),
-                                     str(part.message))
         else:
             encoding = None
         name = part.get_filename()