Update finetune_and_eval.md

docs/API/finetune_and_eval.md

@@ -27,15 +27,14 @@
 >     image_width=resnet_module.get_excepted_image_width(),
 >     image_height=resnet_module.get_excepted_image_height(),
 >     dataset=dataset)
-> with fluid.program_guard(program):
->     label = fluid.layers.data(name="label", dtype="int64", shape=[1])
->     img = input_dict[0]
->     feature_map = output_dict[0]
+> label = fluid.layers.data(name="label", dtype="int64", shape=[1])
+> img = input_dict[0]
+> feature_map = output_dict[0]
 >
->     feed_list = [img.name, label.name]
+> feed_list = [img.name, label.name]
 >
->     task = hub.create_img_cls_task(
->             feature=feature_map, label=label, num_classes=dataset.num_labels)
->     hub.finetune_and_eval(
->         task, feed_list=feed_list, data_reader=data_reader)
+> task = hub.create_img_cls_task(
+>     feature=feature_map, label=label, num_classes=dataset.num_labels)
+> hub.finetune_and_eval(
+>     task, feed_list=feed_list, data_reader=data_reader)
 > ```