Rename unused parameters to '_'.

internal/backend/local/local_windows.go

@@ -5,14 +5,14 @@ import (
 )
 
 // Can't explicitly flush directory changes on Windows.
-func fsyncDir(dir string) error { return nil }
+func fsyncDir(_ string) error { return nil }
 
 // Windows is not macOS.
-func isMacENOTTY(err error) bool { return false }
+func isMacENOTTY(_ error) bool { return false }
 
 // We don't modify read-only on windows,
 // since it will make us unable to delete the file,
 // and this isn't common practice on this platform.
-func setFileReadonly(f string, mode os.FileMode) error {
+func setFileReadonly(_ string, _ os.FileMode) error {
 	return nil
 }