how to delete margin-top: 32px !important from twenty twelve

Question

I want to remove the margin-top property from twenty twelve theme. This is the default theme provided by wordpress. The sample of the code what I found with the help of firebug.

Answer 1

function remove_admin_login_header() {
    remove_action('wp_head', '_admin_bar_bump_cb');
}
add_action('get_header', 'remove_admin_login_header');