[compat, networking] Deprecate old functions (#2861)

Authored by: coletdjnz, pukkandan

yt_dlp/extractor/nbc.py

@@ -6,9 +6,9 @@ from .common import InfoExtractor
 from .theplatform import ThePlatformIE, default_ns
 from .adobepass import AdobePassIE
 from ..compat import compat_urllib_parse_unquote
+from ..networking import HEADRequest
 from ..utils import (
     ExtractorError,
-    HEADRequest,
     RegexNotFoundError,
     UserNotLive,
     clean_html,