Remove references to _.

flatMap.js

@@ -7,7 +7,6 @@ import map from './map.js';
  * with three arguments: (value, index|key, collection).
  *
  * @static
- * @memberOf _
  * @since 4.0.0
  * @category Collection
  * @param {Array|Object} collection The collection to iterate over.
@@ -19,7 +18,7 @@ import map from './map.js';
  *   return [n, n];
  * }
  *
- * _.flatMap([1, 2], duplicate);
+ * flatMap([1, 2], duplicate);
  * // => [1, 1, 2, 2]
  */
 function flatMap(collection, iteratee) {