Remove Python 3.9 support (#13861)

Closes #13858
Authored by: bashonly

yt_dlp/networking/_requests.py

@@ -4,7 +4,6 @@ import functools
 import http.client
 import logging
 import re
-import socket
 import warnings
 
 from ..dependencies import brotli, requests, urllib3
@@ -125,7 +124,7 @@ class RequestsResponseAdapter(Response):
             # Work around issue with `.read(amt)` then `.read()`
             # See: https://github.com/urllib3/urllib3/issues/3636
             if amt is None:
-                # Python 3.9 preallocates the whole read buffer, read in chunks
+                # compat: py3.9: Python 3.9 preallocates the whole read buffer, read in chunks
                 read_chunk = functools.partial(self.fp.read, 1 << 20, decode_content=True)
                 return b''.join(iter(read_chunk, b''))
             # Interact with urllib3 response directly.
@@ -378,7 +377,7 @@ class SocksHTTPConnection(urllib3.connection.HTTPConnection):
                 source_address=self.source_address,
                 _create_socket_func=functools.partial(
                     create_socks_proxy_socket, (self.host, self.port), self._proxy_args))
-        except (socket.timeout, TimeoutError) as e:
+        except TimeoutError as e:
             raise urllib3.exceptions.ConnectTimeoutError(
                 self, f'Connection to {self.host} timed out. (connect timeout={self.timeout})') from e
         except SocksProxyError as e:

yt_dlp/networking/common.py

@@ -12,6 +12,7 @@ import urllib.response
 from collections.abc import Iterable, Mapping
 from email.message import Message
 from http import HTTPStatus
+from types import NoneType
 
 from ._helper import make_ssl_context, wrap_request_errors
 from .exceptions import (
@@ -20,7 +21,6 @@ from .exceptions import (
     TransportError,
     UnsupportedRequest,
 )
-from ..compat.types import NoneType
 from ..cookies import YoutubeDLCookieJar
 from ..utils import (
     bug_reports_message,

yt_dlp/networking/impersonate.py

@@ -3,11 +3,11 @@ from __future__ import annotations
 import re
 from abc import ABC
 from dataclasses import dataclass
+from types import NoneType
 from typing import Any
 
 from .common import RequestHandler, register_preference, Request
 from .exceptions import UnsupportedRequest
-from ..compat.types import NoneType
 from ..utils import classproperty, join_nonempty
 from ..utils.networking import std_headers, HTTPHeaderDict