### Description

The [bootstrap checks docs for 8.1](https://github.com/elastic/elasticsearch/blob/8.1/docs/reference/setup/bootstrap-checks.asciidoc#system-call-filter-check) still have a [section for disabling system call filters](https://www.elastic.co/guide/en/elasticsearch/reference/8.1/_system_call_filter_check.html) even though that setting was removed in 8.0 (#72848) and its removal is [listed in the breaking changes](https://www.elastic.co/guide/en/elastic-stack/8.0/elasticsearch-breaking-changes.html)


server/src/main/java/org/elasticsearch/bootstrap/BootstrapSettings.java
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */
package org.elasticsearch.bootstrap;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Setting.Property;
public final class BootstrapSettings {
    private BootstrapSettings() {}
    
    public static final Setting<Boolean> SECURITY_FILTER_BAD_DEFAULTS_SETTING = Setting.boolSetting(
        "security.manager.filter_bad_defaults",
        true,
        Property.NodeScope
    );
    public static final Setting<Boolean> MEMORY_LOCK_SETTING = Setting.boolSetting("bootstrap.memory_lock", false, Property.NodeScope);
    public static final Setting<Boolean> SYSTEM_CALL_FILTER_SETTING = Setting.boolSetting(
        "bootstrap.system_call_filter",
        true,
        Property.DeprecatedWarning,
        Property.NodeScope
    );
    public static final Setting<Boolean> CTRLHANDLER_SETTING = Setting.boolSetting("bootstrap.ctrlhandler", true, Property.NodeScope);
}