Take a look at the folder here: /templates/t3_blank/tpls and find the file that holds the layout in question…using the default.php as en example, I believe you’d want to remove this line
<?php $this->loadBlock ('mainbody') ?>
The corresponding php called mainbody.php is found in the blocks folder under that. You could either remove the whole line to keep that php file from being called into the layout, or edit the mainbody.php file to be what you want it to be if you don’t want to get rid of the whole thing – like to remove the way a column behaves or whatever.
I didn’t test what I’m saying here, but I believe this is how it would work.
Does that help?
Scott Lavelle - Technical Resource Solutions, LLC
Certified Joomla Administrator