Remove Python 3.10+ redundant patterns

- Remove `from __future__ import annotations` (default in Python 3.10+)
- Remove TYPE_CHECKING guard for Final imports (not needed in 3.10+)
- Import Final directly from typing module
- Use forward references for IniConfig in SectionWrapper

These patterns are no longer needed since we require Python >= 3.10
and PEP 563 postponed evaluation is the default.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: RonnyPfannschmidt

src/iniconfig/__init__.py

@@ -2,19 +2,14 @@
 (C) Ronny Pfannschmidt, Holger Krekel -- MIT licensed
 """
 
-from __future__ import annotations
-
 import os
 from collections.abc import Callable
 from collections.abc import Iterator
 from collections.abc import Mapping
-from typing import TYPE_CHECKING
+from typing import Final
 from typing import TypeVar
 from typing import overload
 
-if TYPE_CHECKING:
-    from typing import Final
-
 __all__ = ["IniConfig", "ParseError", "COMMENTCHARS", "iscommentline"]
 
 from . import _parse
@@ -27,10 +22,10 @@
 
 
 class SectionWrapper:
-    config: Final[IniConfig]
+    config: Final["IniConfig"]
     name: Final[str]
 
-    def __init__(self, config: IniConfig, name: str) -> None:
+    def __init__(self, config: "IniConfig", name: str) -> None:
         self.config = config
         self.name = name
 

src/iniconfig/_parse.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 from typing import NamedTuple
 
 from .exceptions import ParseError

src/iniconfig/exceptions.py

@@ -1,9 +1,4 @@
-from __future__ import annotations
-
-from typing import TYPE_CHECKING
-
-if TYPE_CHECKING:
-    from typing import Final
+from typing import Final
 
 
 class ParseError(Exception):

testing/test_iniconfig.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 from pathlib import Path
 from textwrap import dedent