Two easy ways you can do it.
1. In the page.php template. You can add an if/else statement. This tells the site: if the page is (your-page-name) then do not display the sidebar, else display the sidebar. Its a simple code to implement.
2. Or you can create a specific page template for the page in question (your-page-name.php) add it to your themes files and copy and past everything from the normal page template and just delete the line that reads “get_sidebar();”. This menas that wordpress will use this template for the page in question. You can read more about this method here
The first option is a bit more friendly, but if you want to make further changes to the template file then its probably better to create a new page template file as option 2.