[Delete] 删除不再使用的类和方法;

[Update] 优化Javadoc并设置编译注解, 优化代码;
[Change] 调整部分日志的输出级别;
[Change] RedisPoolCacheStore clear方法将根据返回信息确定是否清空成功;
[Change] Dockerfile.sample 调整镜像构建步骤;

src/main/java/net/lamgc/cgj/bot/RandomRankingArtworksSender.java

@@ -69,7 +69,7 @@ public class RandomRankingArtworksSender extends AutoSender {
                     selectRanking,
                     1, false);
 
-            log.info("RankingResult.size: {}", rankingList.size());
+            log.debug("RankingResult.size: {}", rankingList.size());
             if(rankingList.size() != 1) {
                 log.error("排行榜选取失败!(获取到了多个结果)");
                 return;