@utilities.arguments_not_none<EOL><INDENT>def delete_grade_system(self, grade_system_id):<DEDENT>
collection = JSONClientValidated('<STR_LIT>',<EOL>collection='<STR_LIT>',<EOL>runtime=self._runtime)<EOL>if not isinstance(grade_system_id, ABCId):<EOL><INDENT>raise errors.InvalidArgument('<STR_LIT>')<EOL><DEDENT>grade_system_map = collection.find_one({'<STR_LIT>': ObjectId(grade_system_id.get_identifier())})<EOL>if self._has_columns(grade_system_id):<EOL><INDENT>raise errors.InvalidArgument('<STR_LIT>' +<EOL>'<STR_LIT>')<EOL><DEDENT>objects.GradeSystem(osid_object_map=grade_system_map,<EOL>runtime=self._runtime,<EOL>proxy=self._proxy)._delete()<EOL>collection.delete_one({'<STR_LIT>': ObjectId(grade_system_id.get_identifier())})<EOL>
Deletes a ``GradeSystem``.

        arg:    grade_system_id (osid.id.Id): the ``Id`` of the
                ``GradeSystem`` to remove
        raise:  NotFound - ``grade_system_id`` not found
        raise:  NullArgument - ``grade_system_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*