删除文件 examples/face_adversarial_attack/example

update

update examples/face_adversarial_attack/example/AFR.py.

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/loss_design.py.
MyTrainOneStepCell继承了nn.TrainOneStepCell减少了代码量；删除了无用代码；修改了命名错误。

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/AFR.py.
修改了命名错误；包的顺序。

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/example_non-target_attack.py.
修改包的名称。

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/example_target_attack.py.

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/loss_design.py.

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>

update examples/face_adversarial_attack/example/loss_design.py.

Signed-off-by: 君君臣臣君 <mingjun@isrc.iscas.ac.cn>