Removes leftover instances of the known AI Assistant issue in the 8.x branch (#6299)

Author: nastasha-solomon

docs/release-notes/8.15.asciidoc

@@ -25,17 +25,6 @@
 [[known-issue-8.15.4]]
 ==== Known issues
 
-// tag::known-issue-189676[]
-[discrete]
-.Tags appear in Elastic AI Assistant's responses
-[%collapsible]
-====
-*Details* +
-On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
-
-====
-// end::known-issue-189676[]
-
 [discrete]
 [[enhancements-8.15.4]]
 ==== Enhancements
@@ -62,17 +51,6 @@ On August 1, 2024, it was discovered that Elastic AI Assistant's responses when
 [[known-issue-8.15.3]]
 ==== Known issues
 
-// tag::known-issue-189676[]
-[discrete]
-.Tags appear in Elastic AI Assistant's responses
-[%collapsible]
-====
-*Details* +
-On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
-
-====
-// end::known-issue-189676[]
-
 [discrete]
 [[bug-fixes-8.15.3]]
 ==== Bug fixes
@@ -93,17 +71,6 @@ On August 1, 2024, it was discovered that Elastic AI Assistant's responses when
 [[known-issue-8.15.2]]
 ==== Known issues
 
-// tag::known-issue-189676[]
-[discrete]
-.Tags appear in Elastic AI Assistant's responses
-[%collapsible]
-====
-*Details* +
-On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
-
-====
-// end::known-issue-189676[]
-
 // tag::known-issue-192084[]
 [discrete]
 .Alerts wrongfully inherit previously-selected tags
@@ -157,18 +124,6 @@ On October 17, 2024, this issue was resolved.
 [[known-issue-8.15.1]]
 ==== Known issues
 
-// tag::known-issue-189676[]
-[discrete]
-.Tags appear in Elastic AI Assistant's responses
-[%collapsible]
-====
-*Details* +
-On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
-
-
-====
-// end::known-issue-189676[]
-
 // tag::known-issue-192084[]
 [discrete]
 .Alerts wrongfully inherit previously-selected tags
@@ -239,6 +194,12 @@ On October 17, 2024, this issue was resolved.
 *Details* +
 On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
 
+*Workaround* +
+Upgrade to 8.15.1.
+
+*Resolved* +
+On September 5, 2024, this issue was resolved.
+
 ====
 // end::known-issue-189676[]
 

docs/release-notes/8.16.asciidoc

@@ -209,17 +209,6 @@ Instead of updating an "index" entry, delete it and add it again with the desire
 ====
 // end::known-issue[]
 
-// tag::known-issue-189676[]
-[discrete]
-.Tags appear in Elastic AI Assistant's responses
-[%collapsible]
-====
-*Details* +
-On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
-
-====
-// end::known-issue-189676[]
-
 // tag::known-issue[]
 [discrete]
 .Manually running threshold rules may generate duplicate alerts