Ignore "imported but unused" linter warning on the import of termios

Author: warsaw

Lib/test/libregrtest/save_env.py

@@ -12,7 +12,7 @@
 # Import termios to save and restore terminal echo.  This is only available on
 # Unix, and it's fine if the module can't be found.
 try:
-    import termios
+    import termios                                # noqa: F401
 except ModuleNotFoundError:
     pass