Remove references to _.

nthArg.js

@@ -6,18 +6,17 @@ import toInteger from './toInteger.js';
  * the nth argument from the end is returned.
  *
  * @static
- * @memberOf _
  * @since 4.0.0
  * @category Util
  * @param {number} [n=0] The index of the argument to return.
  * @returns {Function} Returns the new pass-thru function.
  * @example
  *
- * var func = _.nthArg(1);
+ * var func = nthArg(1);
  * func('a', 'b', 'c', 'd');
  * // => 'b'
  *
- * var func = _.nthArg(-2);
+ * var func = nthArg(-2);
  * func('a', 'b', 'c', 'd');
  * // => 'c'
  */