Checkout: Remove PayPal button or additional payments buttons
To remove the PayPal button or other additional payment buttons from your Shopify Checkout screen, you can use the following method.
Use Additional Checkout Buttons setting for the Cart page:
Check this box:
By checking that box and turning ON show additional checkout options on cart, you are toggling OFF the Express Checkout buttons in Shopify Checkout.
You will be turning ON the buttons on your theme's Cart page and turn OFF in Shopify Checkout.
For the reverse result, keep it unchecked. That will turn the buttons OFF on your theme's Cart page and toggle ON the Express Checkout button in Shopify Checkout.
This checkbox on the Cart page section settings is a toggle. Turning ON activates the buttons on the Cart page and turns OFF in Shopify Checkout. By unchecking the option turns OFF the buttons on the Cart page and activates the buttons in Shopify Checkout.
To turn off on both Cart page and Checkout, you must check this box (turn ON for the Cart page) which turns OFF in Shopify Checkout and also use CSS override code in your theme to then HIDE the buttons on the Cart page. To do this, you will have to modify your theme code. Use the following CSS snippet:
Use this link to learn where exactly to add this code snippet: