Go to Edit page
Switch to html mode by checking the box at the bottom
Starting at the begining, look for the first occurrenence of <table .....
Place your cursor before it and hit enter to move it down a line or two
Delete everything before it
Go to the end of the html and look for the last occurence of </table>
Place your cursor after it and hit enter to move the stray code down and then delete it
Hit save page