Fixed #23876 -- Removed dead code in SQLAggregateCompiler.

class SQLAggregateCompiler(SQLCompiler):

    def as_sql(self, compiler=None):

    def as_sql(self):

        """

        Creates the SQL for this query. Returns the SQL string and list of

        parameters.

        """

        if compiler is None:

            compiler = self

        sql, params = [], []

        for annotation in self.query.annotation_select.values():

            agg_sql, agg_params = self.compile(annotation)