Remove Python 3.8 support (#11321)

Closes #10086
Authored by: bashonly

yt_dlp/plugins.py

@@ -1,4 +1,5 @@
 import contextlib
+import functools
 import importlib
 import importlib.abc
 import importlib.machinery
@@ -13,7 +14,6 @@ import zipimport
 from pathlib import Path
 from zipfile import ZipFile
 
-from .compat import functools  # isort: split
 from .utils import (
     Config,
     get_executable_path,