Error logging out message - "Do you really want to log out?""

On my site, when users click my logout button, I get this warning.
"You are attempting to log out of Unbeatable Mind
Do you really want to log out?"

Here is the link I am using for the button "/wp-login.php?action=logout"

I don't want this step to occur, how can I disable this warning?
Thanks,
Rich