Julie here from Shopify Support.
If you want to remove the Review page from your online checkout, you can do so by heading to Settings > Checkout. Under the Order processing section, you'll notice an option to Require a confirmation step. With this option left unchecked, customers should be able to bypass the Review page.
That being said, I'm curious to know why you are wanting to remove the Review page from your online checkout. From a buyer's perspective, I personally find this stage incredibly useful, as it allows me to ensure that my shipping information is correct and that I've added the right products and variants to the cart before finalizing my purchase. If I'm using any discount codes, the Review page also helps me make sure that it's been applied successfully.
I hope this helps and I'm curious to know your use case for removing this step! Feel free to respond here and let me know.