Previous -Next Blog links

Hello, I want to remove the previous and next blog post links that appear at the bottom of each post. Also, I have removed the sidebar.php code because I wanted to remove all sidebar widgets and links. This is working well but since I use a childs theme I am afraid it will just be reinserted with the next wordpress update. Would you please send me the CSS code for the editor? I want permanently disable both of these issues. Thank you.