Remove references to _.

isBoolean.js

@@ -8,17 +8,16 @@ const boolTag = '[object Boolean]';
  * Checks if `value` is classified as a boolean primitive or object.
  *
  * @static
- * @memberOf _
  * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
  * @example
  *
- * _.isBoolean(false);
+ * isBoolean(false);
  * // => true
  *
- * _.isBoolean(null);
+ * isBoolean(null);
  * // => false
  */
 function isBoolean(value) {