Remove 1 column from Top Menu and 2 Columns

[inspiresit]

I have applied the Top Menu and 2 columns template but what I would like to do is to remove the column on the left hand side and then stretch the content section across the entire page. I think I have removed the column on the left but I can't see in the stylesheet where it allows to stretch the content across the entire page.

http://www.holycrossballycahill.com/index.php

[Dr.CSS]

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