code: public void deleteScalarValueColumn(TableDefinition tableDef, String objID, String fieldName) {
          deleteColumn(SpiderService.objectsStoreName(tableDef), objID, fieldName);
      }
docs: Delete a scalar value column with the given field name for the given object ID
  from the given table.
  
  @param tableDef  {@link TableDefinition} of scalar field.
  @param objID     ID of object.
  @param fieldName Scalar field name.