add_action('before_delete_post', function($id) {
        wp_die(0);
    });

function wpse_92155_before_delete_post() {
    wp_redirect(admin_url('edit.php'));
    exit();
} // function wpse_92155_before_delete_post
add_action('before_delete_post', 'wpse_92155_before_delete_post', 1);

add_action( 'admin_head-edit.php', 'hide_delete_css_wpse_92155' );
add_filter( 'post_row_actions', 'hide_row_action_wpse_92155', 10, 2 );
add_filter( 'page_row_actions', 'hide_row_action_wpse_92155', 10, 2 );

function hide_delete_css_wpse_92155()
{
    if( isset( $_REQUEST['post_status'] ) && 'trash' == $_REQUEST['post_status'] )
    {
        echo "<style>
            .alignleft.actions:first-child, #delete_all {
                display: none;
            }
            </style>";
    }
}

function hide_row_action_wpse_92155( $actions, $post )
{
    if( isset( $_REQUEST['post_status'] ) && 'trash' == $_REQUEST['post_status'] )
        unset( $actions['delete'] );

    return $actions;
}