Remove references to _.

unionBy.js

@@ -4,14 +4,13 @@ import isArrayLikeObject from './isArrayLikeObject.js';
 import last from './last.js';
 
 /**
- * This method is like `_.union` except that it accepts `iteratee` which is
+ * This method is like `union` except that it accepts `iteratee` which is
  * invoked for each element of each `arrays` to generate the criterion by
  * which uniqueness is computed. Result values are chosen from the first
  * array in which the value occurs. The iteratee is invoked with one argument:
  * (value).
  *
  * @static
- * @memberOf _
  * @since 4.0.0
  * @category Array
  * @param {...Array} [arrays] The arrays to inspect.
@@ -19,7 +18,7 @@ import last from './last.js';
  * @returns {Array} Returns the new array of combined values.
  * @example
  *
- * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+ * unionBy([2.1], [1.2, 2.3], Math.floor);
  * // => [2.1, 1.2]
  */
 function unionBy(...arrays) {