Her question was;
"Where you sign into FB with your e mail & password, HOW do I delete one/some I don't want there?"
The answer to the question is;
In Internet Explorer, click on your "Tools" menu then find "Internet Options"
Next, click the "Content" tab. You should see a window similar to below.
Next, click the "Settings" tab. (Shown below) if you no longer want any of your usernames and passwords stored, be sure these fields are left blank.
Click "OK", then click "Apply" on the Internet Options window and you're done!