How to remove Footer Menu in Hestia
First time when you install Hestia theme, it creates a menu and assign it the footer location. This menu contains by default all pages that you have. If you want to remove it, it's that simple.
Navigate from your Dashboard to Appearance Menus. Here click on create a new menu and name it as you wish, in this example we will call it Empty Menu. Then click Create Menu.
Add some pages to show them in the footer or let the menu empty if you don't want to show anything in the footer. Now assign it the Footer Menu location. Click Save Menu.
You are done, now the footer menu is gone.