RATIS-2322. Fix Junit Test Error.

Author: slfan1989

ratis-server/src/test/java/org/apache/ratis/WatchRequestTests.java

@@ -302,7 +302,6 @@ static void checkAll(List<CompletableFuture<WatchReplies>> watches, Logger log)
       final WatchReplies watchReplies = watches.get(i).get(GET_TIMEOUT_SECOND, TimeUnit.SECONDS);
       final long logIndex = watchReplies.logIndex;
       log.info("checkAll {}: logIndex={}", i, logIndex);
-      final RaftClientReply watchAllReply = watchReplies.getAll();
 
       final RaftClientReply watchAllCommittedReply = watchReplies.getAllCommitted();
       { // check commit infos