Remove obsolete TODO

Current transfers are just the active threads: getActiveCount()

(Current transfers are included in itemsPending)

Author: iqqu

src/main/java/com/rarchives/ripme/ripper/AbstractRipper.java

@@ -672,7 +672,7 @@ void checkIfComplete() {
             return;
         }
 
-        if (!completed && itemsPending.isEmpty()) { // TODO add itemsActive for current transfers
+        if (!completed && itemsPending.isEmpty()) {
             completed = true;
             logger.info("   Rip of " + getURL() + " completed!");