[utils] Remove sanitize_url_path_consecutive_slashes()

This function is used only in SohuIE, which is updated to use a new
extraction logic.

youtube_dl/utils.py

@@ -327,13 +327,6 @@ def sanitize_path(s):
     return os.path.join(*sanitized_path)
 
 
-def sanitize_url_path_consecutive_slashes(url):
-    """Collapses consecutive slashes in URLs' path"""
-    parsed_url = list(compat_urlparse.urlparse(url))
-    parsed_url[2] = re.sub(r'/{2,}', '/', parsed_url[2])
-    return compat_urlparse.urlunparse(parsed_url)
-
-
 def orderedSet(iterable):
     """ Remove all duplicates from the input iterable """
     res = []