Revert unneeded MLConfigVersion change

Author: edsavage

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/MlConfigVersion.java

@@ -153,13 +153,12 @@ private static void checkUniqueness(int id, String uniqueId) {
     // V_11 is used in ELSER v2 package configs
     public static final MlConfigVersion V_11 = registerMlConfigVersion(11_00_0_0_99, "79CB2950-57C7-11EE-AE5D-0800200C9A66");
     public static final MlConfigVersion V_12 = registerMlConfigVersion(12_00_0_0_99, "Trained model config prefix strings added");
-    public static final MlConfigVersion V_13 = registerMlConfigVersion(13_00_0_0_99, "Anomaly Detection reports actual memory usage");
 
     /**
      * Reference to the most recent Ml config version.
      * This should be the Ml config version with the highest id.
      */
-    public static final MlConfigVersion CURRENT = V_13;
+    public static final MlConfigVersion CURRENT = V_12;
 
     /**
      * Reference to the first MlConfigVersion that is detached from the