Remove guard params.

dropRight.js

@@ -8,7 +8,6 @@ import toInteger from './toInteger.js'
  * @category Array
  * @param {Array} array The array to query.
  * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `map`.
  * @returns {Array} Returns the slice of `array`.
  * @example
  *
@@ -24,12 +23,12 @@ import toInteger from './toInteger.js'
  * dropRight([1, 2, 3], 0)
  * // => [1, 2, 3]
  */
-function dropRight(array, n, guard) {
+function dropRight(array, n=1) {
   const length = array == null ? 0 : array.length
   if (!length) {
     return []
   }
-  n = (guard || n === undefined) ? 1 : toInteger(n)
+  n = toInteger(n)
   n = length - n
   return baseSlice(array, 0, n < 0 ? 0 : n)
 }