refactor(music-houduan): 删除冗余的文件上传代码

- 移除了注释掉的创建目录代码块
-优化了文件上传路径的创建逻辑

music-houduan/src/main/java/com/test/musichouduan/service/impl/FileServiceImpl.java

@@ -163,12 +163,6 @@ public class FileServiceImpl implements FileService {
         String extension = getFileExtension(originalFilename);
         String fileName = UUID.randomUUID().toString() + "." + extension;
 
-//        // 创建目录
-//        File dir = new File(uploadPath + directory);
-//        if (!dir.exists()) {
-//            dir.mkdirs();
-//        }
-
         File root   = new File(uploadPath);  // /uploads
         File bizDir = new File(root, directory);                        // /uploads/bizType
         if (!bizDir.exists()) {