Cant deleted Futered Image in Pages from Code

i have set Post Images on my Sites and Posts, but i do not want to show them in the Page Header.

<div class="featured-image page-header-image  grid-container grid-parent">
<img width="300" height="198" src="image.jpg" class="attachment-full size-full" alt="description" itemprop="image" /></div>

All this hooks NOT working:

add_action( 'wp','generate_remove_page_header' );
function generate_remove_page_header() {
    remove_action('generate_after_header','generate_page_header', 10);
    remove_action('generate_before_content','generate_page_header_inside', 10);
    remove_action('generate_before_content','generate_page_header_single', 10);
    remove_action('generate_after_header','generate_page_header_single_above', 10);
}