reverting adding toString for debugging as is it pulled out into #131787

Author: mjmbischoff

server/src/main/java/org/elasticsearch/common/cache/RemovalNotification.java

@@ -37,9 +37,4 @@ public V getValue() {
     public RemovalReason getRemovalReason() {
         return removalReason;
     }
-
-    @Override
-    public String toString() {
-        return "RemovalNotification{" + "key=" + key + ", value=" + value + ", removalReason=" + removalReason + '}';
-    }
 }