应用: 快手
任务: 打开快手，找到一条收藏的视频，取消收藏
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: STOP