Remove misleading comment

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=144485773

javatests/google/registry/testing/HistoryEntrySubject.java

@@ -40,9 +40,6 @@ public class HistoryEntrySubject extends Subject<HistoryEntrySubject, HistoryEnt
 
   @Override
   public String actualCustomStringRepresentation() {
-    // This will unfortunately not use the customName field in the superclass, but we can't call
-    // super.actualAsString(), because as currently implemented, it would result in an infinite
-    // recursion.
     return Optional.fromNullable(customDisplaySubject).or(String.valueOf(actual()));
   }