From Pages or single post pages?
To remove it, find the following in the single.php or template you use for your Pages and comment it out or delete it:
<?php get_sidebar(); ?>
Now, that said, you will have to get into your style.css and make changes, if you want, to allow the content to fill in to where the sidebar sits.
Also, many people like this “clean” look for their single posts, but one of the big complains we get about this is the lack of decent navigation to encourage people to continue staying on your site and reading other material. Just information.
Comment out the tag and then you can easily switch back later.
If you do not use a single.php template file, then there are other steps you can take, like using the one from the Default Theme and changing it to meet your neets.
