Update based on review

- Removes antiquated language ("the following..." )
- Removes inaccurate info suggesting that we still support deprecated/obsolete settings
- Removes invalid reference so that we won't break the docs builds

Co-authored-by: Karen Metts <[email protected]>

docs/index.asciidoc

@@ -96,7 +96,7 @@ TIP: Set the `target` option to avoid potential schema conflicts.
 [id="plugins-{type}s-{plugin}-options"]
 ==== Elasticsearch Input configuration options
 
-This plugin supports the following configuration options plus the <<plugins-{type}s-{plugin}-common-options>> and the <<plugins-{type}s-{plugin}-deprecated-options>> described later.
+This plugin supports these configuration options plus the <<plugins-{type}s-{plugin}-common-options>> described later.
 
 NOTE: As of version `5.0.0` of this plugin, a number of previously deprecated settings related to SSL have been removed.
 Please check out <<plugins-{type}s-{plugin}-obsolete-options>> for details.