remove gpu infer (#5530)

* remove gpu inference

tutorials/mobilenetv3_prod/Step6/test_tipc/configs/mobilenet_v3_small/train_fleet_infer_python.txt

@@ -25,7 +25,7 @@ train_model:./pretrain_models/mobilenet_v3_small_pretrained.pdparams
 infer_export:tools/export_model.py --model=mobilenet_v3_small
 ##
 inference:deploy/inference_python/infer.py
---use-gpu:True|False
+--use-gpu:False
 --batch-size:1
 --model-dir:./output/mobilenet_v3_small_infer/
 --img-path:./images/demo.jpg

tutorials/mobilenetv3_prod/Step6/train.py

@@ -281,6 +281,7 @@ def main(args):
         train_one_epoch(model, criterion, optimizer, data_loader, epoch,
                         args.print_freq, args.amp_level, scaler)
         lr_scheduler.step()
+        if paddle.distributed.get_rank() == 0:
             top1 = evaluate(
                 model, criterion, data_loader_test, amp_level=args.amp_level)
             if args.output_dir: