[DOCS] Remove SQL access settings page (#60078)

This page previously documented `xpack.sql.enabled`.

However, in 7.8 and above, `xpack.sql.enabled` is always enabled and
the setting has no effect. There is no reason to maintain this page.

docs/reference/redirects.asciidoc

@@ -909,6 +909,11 @@ Tribe node functionality has been removed in favor of {ccs}. See
 
 See <<release-highlights>>.
 
+[role="exclude",id="sql-settings"]
+=== SQL access settings in Elasticsearch
+
+The `xpack.sql.enabled` setting has been deprecated. SQL access is always enabled.
+
 ////
 [role="exclude",id="search-request-body"]
 === Request body search

docs/reference/settings/sql-settings.asciidoc

@@ -1,15 +0,0 @@
-[role="xpack"]
-[[sql-settings]]
-=== SQL access settings in Elasticsearch
-++++
-<titleabbrev>SQL access settings</titleabbrev>
-++++
-
-SQL Access is always enabled.
-
-[float]
-[[general-sql-settings]]
-==== General SQL Access Settings
-`xpack.sql.enabled`::
-deprecated:[7.8.0,Basic License features should always be enabled] +
-This deprecated setting no longer has any effect.

docs/reference/setup.asciidoc

@@ -91,8 +91,6 @@ include::modules/indices/request_cache.asciidoc[]
 
 include::settings/slm-settings.asciidoc[]
 
-include::settings/sql-settings.asciidoc[]
-
 include::settings/transform-settings.asciidoc[]
 
 include::modules/transport.asciidoc[]