Hi @ADRIANAVERGARA ...
Unfortunately, I'm not aware of anything with the Canvas UI (User Interface) either from an instructor standpoint or a Canvas administrator standpoint that hides the "Import" button within the Canvas Gradebook. I don't know if there would be any way to code the button to be hidden from instructors or not. That is beyond my scope of knowledge. Keep in mind, if this were possible, then if people are looking at Canvas Guides here in the Community, the Guides will make reference to an "Import" button, but you wouldn't have it in your courses...which could be confusing for your instructors.
Sorry I don't have better news for you, but I hope this helps to answer your question.
