[to #42322933] fix cpu inference

修复cpu推理
        Link: https://code.alibaba-inc.com/Ali-MaaS/MaaS-lib/codereview/10468823

modelscope/models/cv/face_human_hand_detection/one_stage_detector.py

@@ -56,9 +56,6 @@ class OneStageDetector(nn.Module):
 
     def inference(self, meta):
         with torch.no_grad():
-            torch.cuda.synchronize()
             preds = self(meta['img'])
-            torch.cuda.synchronize()
             results = self.head.post_process(preds, meta)
-            torch.cuda.synchronize()
         return results