SBCL警告已定义变量但从未使用过

我从sbcl编译器收到警告，该变量已定义但未使用。而且编译器是正确的。我想摆脱警告，但不知道如何去做。这是一个例子：

(defun worker-1 (context p)
  ;; check context (make use of context argument)
  (if context
      (print p)))

 (defun worker-2 (context p)
   ;; don't care about context
   ;; will throw a warning about unused argument
   (print p))

 ;;
 ;; calls a given worker with context and p
 ;; doesn't know which arguments will be used by the
 ;; implementation of the called worker
 (defun do-cmd (workerFn context p)
   (funcall workerFn context p))

 (defun main ()
    (let ((context ()))
     (do-cmd #'worker-1 context "A")
     (do-cmd #'worker-2 context "A")))

do-cmd-function期望实现特定接口f（context p）的辅助函数。

sbcl编译器将引发以下警告：

in: DEFUN WORKER-2
;     (DEFUN WORKER-2 (CONTEXT P) (PRINT P))
;
; caught STYLE-WARNING:
 ;   The variable CONTEXT is defined but never used.
;
; compilation unit finished
;   caught 1 STYLE-WARNING condition