### 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/test/java/org/elasticsearch/bootstrap/BootstrapChecksTests.java
BootstrapChecks.check(emptyContext, true, Collections.singletonList(check));
    }
    public void testUseSerialGCCheck() throws NodeValidationException {
        final AtomicReference<String> useSerialGC = new AtomicReference<>("true");
        final BootstrapCheck check = new BootstrapChecks.UseSerialGCCheck() {
            @Override
            String getUseSerialGC() {
                return useSerialGC.get();
            }
        };
        final NodeValidationException e = expectThrows(
            NodeValidationException.class,
            () -> BootstrapChecks.check(emptyContext, true, Collections.singletonList(check))
        );
        assertThat(
            e.getMessage(),
            containsString(
                "JVM is using the serial collector but should not be for the best performance; "
                    + ""
                    + "either it's the default for the VM ["
                    + JvmInfo.jvmInfo().getVmName()
                    + "] or -XX:+UseSerialGC was explicitly specified"
            )
        );
        useSerialGC.set("false");
        BootstrapChecks.check(emptyContext, true, Collections.singletonList(check));
    }
    public void testSystemCallFilterCheck() throws NodeValidationException {
        final AtomicBoolean isSystemCallFilterInstalled = new AtomicBoolean();
        final BootstrapContext context;