How to remove front page posting bar

link to website and theme please?

Thanks.Theme is P2
Here is the my website
I removed the frontpage posting box and it removed the sidebar also.
I want to add catergories as menu.

With “posting box” you mean the form from where you post when you are logged in.
remove these lines in index.php:

<?php if ( p2_user_can_post() && !is_archive() ) : ?>
<?php locate_template( array( 'post-form.php' ), true ) ?>
<?php endif; ?>

In the dashboard under “Appearance” > “Widgets” you can add a categories menu to the sidebar.

Thanks posting box was removed but the sidebar is not there and how to remove the gravatar box
I appreciate your time

To remove avatars go to “Settings” > “Discussion” and select “Don’t show Avatars”. And save your chacnges. Maybe you hide the sidebar in the theme’s options. go to “Appearance” > “Theme options” and be sure the option “Hide the Sidebar” is not selected