删除 pid 字段, 通过 channelId 间接指定 pid

oss-common/src/main/java/cn/reghao/oss/common/UploadFilePart.java

@@ -16,7 +16,6 @@ import java.io.Serializable;
 public class UploadFilePart implements Serializable {
     private static final long serialVersionUID = 1L;
 
-    private String pid;
     private int channelId;
     // 文件标识
     private String identifier;