Remove guard params.

ary.js

@@ -11,15 +11,13 @@ const WRAP_ARY_FLAG = 128
  * @category Function
  * @param {Function} func The function to cap arguments for.
  * @param {number} [n=func.length] The arity cap.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `map`.
  * @returns {Function} Returns the new capped function.
  * @example
  *
  * map(['6', '8', '10'], ary(parseInt, 1))
  * // => [6, 8, 10]
  */
-function ary(func, n, guard) {
-  n = guard ? undefined : n
+function ary(func, n) {
   n = (func && n == null) ? func.length : n
   return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n)
 }