Remove baseIteratee and castFunction.

reject.js

@@ -1,6 +1,5 @@
 import arrayFilter from './_arrayFilter.js';
 import baseFilter from './_baseFilter.js';
-import baseIteratee from './_baseIteratee.js';
 import isArray from './isArray.js';
 import negate from './negate.js';
 
@@ -13,7 +12,7 @@ import negate from './negate.js';
  * @since 0.1.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  * @see _.filter
  * @example
@@ -25,22 +24,10 @@ import negate from './negate.js';
  *
  * _.reject(users, function(o) { return !o.active; });
  * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.reject(users, { 'age': 40, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.reject(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.reject(users, 'active');
- * // => objects for ['barney']
  */
 function reject(collection, predicate) {
   const func = isArray(collection) ? arrayFilter : baseFilter;
-  return func(collection, negate(baseIteratee(predicate, 3)));
+  return func(collection, negate(predicate));
 }
 
 export default reject;