How to PERMANENTLY disable safari sidebar please?!?!

Where is the option to remove the sidebar from appearing everytime I move or place my cursor on the left side of my screen? This is very annoying because its like this HUGE popup on the side of my screen everytime. There needs to be an option to change the placement or to PERMANENTLY disable this sidebar in safari settings. It is absolutely useless and annoying, PLEASE HELP. THANK YOU!