fix infer

tests/ocr_det_params.txt

@@ -34,9 +34,9 @@ distill_export:null
 export1:null
 export2:null
 ##
-infer_model:./inference/ch_ppocr_mobile_v2.0_det_train/best_accuracy|./inference/ch_mobile_det_quant_dev_lr/inference/
-infer_export:tools/export_model.py -c configs/det/det_mv3_db.yml -o |null
-infer_quant:False|True
+infer_model:./inference/ch_ppocr_mobile_v2.0_det_infer/
+infer_export:null
+infer_quant:False
 inference:tools/infer/predict_det.py
 --use_gpu:True|False
 --enable_mkldnn:True|False