To create or remove pages like About Us, Delivery Information and Terms & Conditions, you can do so at Catalog > Information.
Click Insert to create a new static page or select the page that you want to delete and click Delete.
You will see 2 fields available which are Information Title and Description.
For example if you want to create an About Us page, put About Us as the title and all your content in the Description area.
You can also upload images and paste it inside the description field.
In Data tab, tick the Bottom option if you want to show this page in your footer.
This will not work sometimes due to how your store is coded and if you want to display the page in your footer and it is not working, kindly contact us at firstname.lastname@example.org
Sort it if you like and leave the rest of the options as default.
Click Save and the page will publish.