protected void unregisterApiContracts(Client client, Connection connection) throws SQLException {
        QueryRunner run = new QueryRunner();
        run.update(connection, "DELETE FROM contracts WHERE client_org_id = ? AND client_id = ? AND client_version = ?",  //$NON-NLS-1$
                client.getOrganizationId(), client.getClientId(), client.getVersion());
    }
Removes all of the api contracts from the database.
@param client
@param connection
@throws SQLException
gateway/engine/jdbc/src/main/java/io/apiman/gateway/engine/jdbc/JdbcRegistry.java