Cleanup: suppress various pylint warnings

tools/utils/autopep8_clean_config.py

@@ -10,11 +10,6 @@ __all__ = (
 
 import os
 
-from collections.abc import (
-    Callable,
-    Iterator,
-)
-
 PATHS: tuple[str, ...] = (
     "build_files",
     "doc",

tools/utils/git_log_review_commits.py

@@ -57,6 +57,7 @@ class _GetchWindows:
 
     def __init__(self):
         import msvcrt
+        del msvcrt
 
     def __call__(self):
         import msvcrt

tools/utils/git_log_review_commits_advanced.py

@@ -78,10 +78,9 @@ class _GetchUnix:
 
     def __init__(self):
         import tty
-        import sys
+        del tty
 
     def __call__(self):
-        import sys
         import tty
         import termios
         fd = sys.stdin.fileno()
@@ -98,6 +97,7 @@ class _GetchWindows:
 
     def __init__(self):
         import msvcrt
+        del msvcrt
 
     def __call__(self):
         import msvcrt