Remove item with $product_id - Woocommerce

Question

Made a function where the customer get a product added to the cart when they reach a specific amount.

Example of when customer reaches level 3 and get the

Answer 1

Use this for latest versions of WooCommerce:

$cartId = WC()->cart->generate_cart_id( 'PRODUCT ID' );
$cartItemKey = WC()->cart->find_product_in_cart( $cartId );
WC()->cart->remove_cart_item( $cartItemKey );

replace PRODUCT ID with yours.