delete unused params.txt

tests/ocr_det_params.txt

 ===========================train_params===========================
 model_name:ocr_det
 python:python3.7
-gpu_list:3
+gpu_list:0|0,1
 Global.use_gpu:True|True
 Global.auto_cast:null
 Global.epoch_num:lite_train_infer=1|whole_train_infer=300

tests/ocr_det_params_prune.txt

-===========================train_params===========================
-model_name:ocr_det
-python:python3.7
-gpu_list:3
-Global.use_gpu:True
-Global.auto_cast:null
-Global.epoch_num:lite_train_infer=1|whole_train_infer=300
-Global.save_model_dir:./output/
-Train.loader.batch_size_per_card:lite_train_infer=2|whole_train_infer=4
-Global.pretrained_model:null
-train_model_name:latest
-train_infer_img_dir:./train_data/icdar2015/text_localization/ch4_test_images/
-null:null
-##
-trainer:fpgm_train
-norm_train:null
-pact_train:null
-fpgm_train:deploy/slim/prune/sensitivity_anal.py -c configs/det/det_mv3_db.yml -o 
-distill_train:null
-null:null
-null:null
-##
-===========================eval_params=========================== 
-eval:tools/eval.py -c configs/det/det_mv3_db.yml -o
-null:null
-##
-===========================infer_params===========================
-Global.save_inference_dir:./output/
-Global.pretrained_model:
-norm_export:tools/export_model.py -c configs/det/det_mv3_db.yml -o 
-quant_export:deploy/slim/quantization/export_model.py -c configs/det/det_mv3_db.yml -o 
-fpgm_export:deploy/slim/prune/export_prune_model.py -c configs/det/det_mv3_db.yml -o 
-distill_export:null
-export1:null
-export2:null
-##
-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
---cpu_threads:1|6
---rec_batch_num:1
---use_tensorrt:False|True
---precision:fp32|fp16|int8
---det_model_dir:
---image_dir:./inference/ch_det_data_50/all-sum-510/
---save_log_path:null
---benchmark:True
-null:null
-