Remove Import Button in odoo tree view
You need to extend the ListView (list_view.js) and change the method render_buttons. You can then render a custom template (you can use ListView.buttons template as a reference) with the buttons you need. 
You can do the same for the KanbanView (kanban_view.js).
I need to remove import button from my tree view and need to add edit button for tree view . How can I do that.. 
Also I need to create button near create button in kanban view to go for another tree view. How can I do that... Please help me..