Minor touchups

Change-Id: I0fee1becb6cbb002b30d45a06e7ea3523636dfb4

@@ -158,7 +158,6 @@ public class AsyncConsistentSetMultimap
 
     @Override
     public CompletableFuture<Map<String, Collection<byte[]>>> asMap() {
-        //TODO
         throw new UnsupportedOperationException("Expensive operation.");
     }
 

@@ -476,11 +476,6 @@ public class AsyncConsistentSetMultimapState extends ResourceStateMachine
                 });
                 if (valuesToAdd.isEmpty()) {
                     //Do not increment or add the commit if no change resulted
-//                    TODO fairly sure the below case is unreachable but
-//                    TODO need to make sure
-//                    if (valueCountdownMap.isEmpty()) {
-//                        backingMap.remove(((Put) commit.operation()).key());
-//                    }
                     commit.close();
                     return null;
                 }