删除了一些没什么用的代码

backend/src/main/java/com/backend/mapper/UserMapper.java

@@ -16,9 +16,6 @@ public interface UserMapper {
     @Update("update user set nickname=#{nickname}, phone=#{phone}, email=#{email}, update_time=now() where id=#{id}")
     void update(final User user);
 
-    @Update("update user set user_pic=#{url}, update_time=now() where id=#{id}")
-    void updateAvatar(final String url, final Integer id);
-
     @Update("update user set password=#{md5String}, update_time=now() where id=#{id}")
     void updatePwd(final String md5String, final Integer id);
 }