Remove outdated resources in demo/ (#1747)

* Remove outdated resources in demo/

* update

demo/webcam_demo.py

@@ -1,48 +0,0 @@
-# Copyright (c) OpenMMLab. All rights reserved.
-import argparse
-
-import cv2
-import torch
-
-from mmocr.apis import init_detector, model_inference
-from mmocr.registry import DATASETS  # noqa: F401
-
-
-def parse_args():
-    parser = argparse.ArgumentParser(description='MMDetection webcam demo.')
-    parser.add_argument('config', help='Test config file path.')
-    parser.add_argument('checkpoint', help='Checkpoint file.')
-    parser.add_argument(
-        '--device', type=str, default='cuda:0', help='CPU/CUDA device option.')
-    parser.add_argument(
-        '--camera-id', type=int, default=0, help='Camera device id.')
-    parser.add_argument(
-        '--score-thr', type=float, default=0.5, help='Bbox score threshold.')
-    args = parser.parse_args()
-    return args
-
-
-def main():
-    args = parse_args()
-
-    device = torch.device(args.device)
-
-    model = init_detector(args.config, args.checkpoint, device=device)
-
-    camera = cv2.VideoCapture(args.camera_id)
-
-    print('Press "Esc", "q" or "Q" to exit.')
-    while True:
-        ret_val, img = camera.read()
-        result = model_inference(model, img)
-
-        ch = cv2.waitKey(1)
-        if ch == 27 or ch == ord('q') or ch == ord('Q'):
-            break
-
-        model.show_result(
-            img, result, score_thr=args.score_thr, wait_time=1, show=True)
-
-
-if __name__ == '__main__':
-    main()