Hi,

To revert the changes that you have applied using the odoo studio for the views, what you can do is that, activate the developer mode from settings, then open the view for which you have to revert the changes that you made using the studio, click the debugger button at the top right of the screen near logged in user name, click Edit View Form (Kanban/List), then in the Inherited Views Page

You will see a record with External ID staring in studio_customization, like below,

Just click the delete button at the right of the lines, so that it will get deleted.

Thanks