[cleanup] Deprecate more compat functions (#11439)

Authored by: seproDev

yt_dlp/compat/__init__.py

@@ -1,5 +1,4 @@
 import os
-import sys
 import xml.etree.ElementTree as etree
 
 from .compat_utils import passthrough_module
@@ -24,33 +23,14 @@ def compat_etree_fromstring(text):
     return etree.XML(text, parser=etree.XMLParser(target=_TreeBuilder()))
 
 
-compat_os_name = os._name if os.name == 'java' else os.name
-
-
-def compat_shlex_quote(s):
-    from ..utils import shell_quote
-    return shell_quote(s)
-
-
 def compat_ord(c):
     return c if isinstance(c, int) else ord(c)
 
 
-if compat_os_name == 'nt' and sys.version_info < (3, 8):
-    # os.path.realpath on Windows does not follow symbolic links
-    # prior to Python 3.8 (see https://bugs.python.org/issue9949)
-    def compat_realpath(path):
-        while os.path.islink(path):
-            path = os.path.abspath(os.readlink(path))
-        return os.path.realpath(path)
-else:
-    compat_realpath = os.path.realpath
-
-
 # Python 3.8+ does not honor %HOME% on windows, but this breaks compatibility with youtube-dl
 # See https://github.com/yt-dlp/yt-dlp/issues/792
 # https://docs.python.org/3/library/os.path.html#os.path.expanduser
-if compat_os_name in ('nt', 'ce'):
+if os.name in ('nt', 'ce'):
     def compat_expanduser(path):
         HOME = os.environ.get('HOME')
         if not HOME: