prefix argument with _ to suppress Unused lexical argument warning

per @tarsius’s comment
5d9c854a6c (commitcomment-29996666)

lisp/use-package/use-package-chords.el

@@ -30,7 +30,7 @@
 (defalias 'use-package-normalize/:chords 'use-package-normalize-binder)
 
 ;;;###autoload
-(defun use-package-handler/:chords (name keyword arg rest state)
+(defun use-package-handler/:chords (name _keyword arg rest state)
   "Handler for `:chords' keyword in `use-package'."
   (use-package-concat
    (use-package-process-keywords name rest state)