Errors in the file “error_log”

After the update 3.0.1 file “error_log” was faced with the following error

The The “add_to_cart_fragments” hook uses out of date data structures and function is deprecated since version 3.0.1. Replace with woocommerce_add_to_cart_fragments.

Note: Because of an “Product data : External/Affiliate product” I use only one page “Shop – Front Page” I use
And pages “Cart” & “Checkout” & “My account” do not use
please guide me