Remove /weights directory (#3659)

* Remove `/weights` directory

* cleanup

detect.py

@@ -63,8 +63,8 @@ def detect(weights='yolov5s.pt',  # model.pt path(s)
     # Second-stage classifier
     classify = False
     if classify:
-        modelc = load_classifier(name='resnet101', n=2)  # initialize
-        modelc.load_state_dict(torch.load('weights/resnet101.pt', map_location=device)['model']).to(device).eval()
+        modelc = load_classifier(name='resnet50', n=2)  # initialize
+        modelc.load_state_dict(torch.load('resnet50.pt', map_location=device)['model']).to(device).eval()
 
     # Set Dataloader
     vid_path, vid_writer = None, None