[ML] Remove unused notification messages (#74318)

Removes messages that are no longer used for
creating notifications.

Author: dimitris-athanasiou

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/job/messages/Messages.java

@@ -78,8 +78,6 @@ public final class Messages {
     public static final String DATA_FRAME_ANALYTICS_AUDIT_ESTIMATED_MEMORY_USAGE_HIGHER_THAN_CONFIGURED =
         "Configured model memory limit [{0}] is lower than the expected memory usage [{1}]. " +
             "The analytics job may fail due to configured memory constraints.";
-    public static final String DATA_FRAME_ANALYTICS_AUDIT_UNABLE_TO_ESTIMATE_MEMORY_USAGE =
-        "Data frame analytics is unable to provide an accurate estimate. Unable to determine if configured memory [{0}] is adequate.";
     public static final String DATA_FRAME_ANALYTICS_AUDIT_CREATING_DEST_INDEX = "Creating destination index [{0}]";
     public static final String DATA_FRAME_ANALYTICS_AUDIT_REUSING_DEST_INDEX = "Using existing destination index [{0}]";
     public static final String DATA_FRAME_ANALYTICS_AUDIT_STARTED_REINDEXING = "Started reindexing to destination index [{0}]";
@@ -163,7 +161,6 @@ public final class Messages {
     public static final String JOB_AUDIT_REVERTED = "Job model snapshot reverted to ''{0}''";
     public static final String JOB_AUDIT_SNAPSHOT_DELETED = "Model snapshot [{0}] with description ''{1}'' deleted";
     public static final String JOB_AUDIT_SNAPSHOTS_DELETED = "[{0}] expired model snapshots deleted";
-    public static final String JOB_AUDIT_FILTER_UPDATED_ON_PROCESS = "Updated filter [{0}] in running process";
     public static final String JOB_AUDIT_CALENDARS_UPDATED_ON_PROCESS = "Updated calendars in running process";
     public static final String JOB_AUDIT_MEMORY_STATUS_SOFT_LIMIT = "Job memory status changed to soft_limit; memory pruning will now be " +
             "more aggressive";