Replace EM Wrapper for Genesis Childthemes

you have 2 filters:
em_content_wrapper_start
em_content_wrapper_end

just use them and for e.g. set it to output nothing. like that:

// remove content wrappers
function em_remove_content_wrappers($output) {
	return '';
}
add_filter('em_content_wrapper_start', 'em_remove_content_wrappers');
add_filter('em_content_wrapper_end', 'em_remove_content_wrappers');

That worked! Here’s the php I used:

/******************************************
*  EM Integration with Genesis Child Theme
*******************************************/

// remove content wrappers
function em_remove_content_wrappers($output) {
	return '';
}
add_filter('em_content_wrapper_start', 'em_remove_content_wrappers');
add_filter('em_content_wrapper_end', 'em_remove_content_wrappers');

/**
 * Add Genesis custom  EM content  wrappers
 */
add_action('em_before_main_content', 'genesis_em_wrapper_start', 10);
add_action('em_after_main_content', 'genesis_em_wrapper_end', 10);

function genesis_em_wrapper_start() {
    echo '<div class="content-sidebar-wrap"><main class="content" role="main" itemprop="mainContentOfPage">';

}

function genesis_em_wrapper_end() {
        echo'</div> <!-- end main-->';
        get_sidebar();
        echo'</div> <!-- end .content-sidebar-wrap-->';
}

/***********************************************
*  // END EM Integration with Genesis ChildTheme
************************************************/