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.venv/Lib/site-packages/pip/_internal/utils/urls.py

@@ -2,17 +2,10 @@ import os
 import string
 import urllib.parse
 import urllib.request
-from typing import Optional
 
 from .compat import WINDOWS
 
 
-def get_url_scheme(url: str) -> Optional[str]:
-    if ":" not in url:
-        return None
-    return url.split(":", 1)[0].lower()
-
-
 def path_to_url(path: str) -> str:
     """
     Convert a path to a file: URL.  The path will be made absolute and have