Remove references to _.

add.js

@@ -4,7 +4,6 @@ import createMathOperation from './_createMathOperation.js';
  * Adds two numbers.
  *
  * @static
- * @memberOf _
  * @since 3.4.0
  * @category Math
  * @param {number} augend The first number in an addition.
@@ -12,7 +11,7 @@ import createMathOperation from './_createMathOperation.js';
  * @returns {number} Returns the total.
  * @example
  *
- * _.add(6, 4);
+ * add(6, 4);
  * // => 10
  */
 const add = createMathOperation((augend, addend) => augend + addend, 0);