Revert "add amp decorator and parse_batch decorator"

This reverts commit 40085883.

ppcls/arch/backbone/legendary_models/mobilenet_v1.py

@@ -22,8 +22,6 @@ from paddle.nn import Conv2D, BatchNorm, Linear, ReLU, Flatten
 from paddle.nn import AdaptiveAvgPool2D
 from paddle.nn.initializer import KaimingNormal
 
-from ..base import clas_forward_decorator
-from ....utils.amp import AMP_forward_decorator
 from ..base.theseus_layer import TheseusLayer
 from ....utils.save_load import load_dygraph_pretrain, load_dygraph_pretrain_from_url
 
@@ -164,8 +162,6 @@ class MobileNet(TheseusLayer):
             return_patterns=return_patterns,
             return_stages=return_stages)
 
-    @AMP_forward_decorator
-    @clas_forward_decorator
     def forward(self, x):
         x = self.conv(x)
         x = self.blocks(x)