Remove URL support

docs/en/modes/predict.md

@@ -247,14 +247,14 @@ Below are code examples for using each source type:
 
     === "txt"
 
-        Run inference on a collection of images, URLs, videos and directories listed in a txt file.
+        Run inference on a collection of images, videos and directories listed in a txt file.
         ```python
         from ultralytics import YOLO
 
         # Load a pretrained YOLOv8n model
         model = YOLO("yolov8n.pt")
 
-        # Define a path to a txt file with images, URLs, videos and directories
+        # Define a path to a txt file with images, videos and directories
         source = "path/to/file.txt"
 
         # Run inference on the source

ultralytics/engine/predictor.py

@@ -8,7 +8,7 @@ Usage - sources:
                                                 vid.mp4                         # video
                                                 screen                          # screenshot
                                                 path/                           # directory
-                                                list.txt                        # list of images
+                                                list.txt                        # list of images, videos, directories
                                                 list.streams                    # list of streams
                                                 'path/*.jpg'                    # glob
                                                 'https://youtu.be/LNwODJXcvt4'  # YouTube