Revert "Fix support for Python 3.9 (sphinx-doc#157)"

This reverts commit 55917c6.

NEWS.rst

@@ -4,8 +4,6 @@ Changelog
 unreleased
 ----------
 
-* Fix support for Python 3.9.
-
 2024.04.16 - 2024-04-16
 -----------------------
 

sphinx_autobuild/server.py

@@ -2,7 +2,6 @@
 
 import asyncio
 import os
-import sys
 from concurrent.futures import ProcessPoolExecutor
 from contextlib import AbstractAsyncContextManager, asynccontextmanager
 from typing import TYPE_CHECKING
@@ -25,15 +24,7 @@ def __init__(
         ignore_filter: IgnoreFilter,
         change_callback: Callable[[], None],
     ) -> None:
-        if sys.version_info[:2] >= (3, 10):
-            self.paths = [os.path.realpath(path, strict=True) for path in paths]
-        else:
-            self.paths = [os.path.realpath(path) for path in paths]
-            # Sanity check the paths
-            for p in self.paths:
-                if not os.path.exists(p):
-                    raise FileNotFoundError(p)
-
+        self.paths = [os.path.realpath(path, strict=True) for path in paths]
         self.ignore = ignore_filter
         self.change_callback = change_callback
         self.flag = asyncio.Event()