fix test failures

Author: valeriy42

docs/changelog/121667.yaml

@@ -6,8 +6,6 @@ issues:
  - 121506
 deprecation:
   title: Add deprecation warning for flush API
-  area: Machine Learning
-  details: "The anomaly detection job flush API is deprecated since it is only required\
-    \ for the post data API, which was deprecated since 7.11.0."
-  impact: "This should have a minimal impact on users as the flush API is only required\
-    \ for the post data API, which was deprecated since 7.11.0."
+  area: REST API
+  details: The anomaly detection job flush API is deprecated since it is only required for the post data API, which was deprecated since 7.11.0.
+  impact: This should have a minimal impact on users as the flush API is only required for the post data API, which was deprecated since 7.11.0.

docs/reference/ml/anomaly-detection/apis/flush-job.asciidoc

@@ -5,8 +5,6 @@
 <titleabbrev>Flush jobs</titleabbrev>
 ++++
 
-deprecated::[9.1.0, "Forcing any buffered data to be processed is deprecated, in a future major version a <<ml-api-datafeed-endpoint,{dfeed}>> will be required."]
-
 .New API reference
 [sidebar]
 --

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/rest/job/RestPostDataAction.java

@@ -29,7 +29,7 @@ public class RestPostDataAction extends BaseRestHandler {
     @Override
     public List<Route> routes() {
         final String msg = "Posting data directly to anomaly detection jobs is deprecated, "
-            + "since version 7.11.0, in a future major version it will be compulsory to use a datafeed";
+            + "in a future major version it will be compulsory to use a datafeed";
         return List.of(Route.builder(POST, BASE_PATH + "anomaly_detectors/{" + Job.ID + "}/_data").deprecateAndKeep(msg).build());
     }