chore(syntax): autoflake / pyupgrade pass

pip install pyupgrade autoflake; \
pyupgrade --py37 tests/**/*.py docs/**/*.py libtmux/**/*.py; \
poetry run autoflake tests/**/*.py docs/**/*.py libtmux/**/*.py -i --ignore-init-module-imports --exclude libtmux/_compat.py; \
make black isort

Author: tony

docs/conf.py

@@ -1,6 +1,5 @@
 # flake8: NOQA E5
 import inspect
-import os
 import sys
 from os.path import dirname, relpath
 from pathlib import Path

libtmux/common.py

@@ -11,19 +11,8 @@
 import subprocess
 import sys
 import typing as t
-from collections.abc import MutableMapping
 from distutils.version import LooseVersion
-from typing import (
-    Any,
-    Dict,
-    Generic,
-    KeysView,
-    List,
-    Optional,
-    TypeVar,
-    Union,
-    overload,
-)
+from typing import Dict, Generic, KeysView, List, Optional, TypeVar, Union, overload
 
 from . import exc
 from ._compat import console_to_str, str_from_console

libtmux/pane.py

@@ -7,7 +7,7 @@
 """
 import logging
 import typing as t
-from typing import Dict, overload
+from typing import overload
 
 from libtmux.common import tmux_cmd