sidebar.php: modifying the conditional under if(is_search()), so that the php doesn't exit and crash the page. Comment out the Google search box markup. Remove the javascript for the Goolge search sidebar feature, since that will not be used this child theme.
style.css: Add css rule to ensure that extension logo is positioned correcty on the search.php page.
main-child.scss: Expand the content div to full width, since there will be no sidebar on search.php