Hi there, to remove the search icon at the top, you’ll need to first create a child theme, so your changes won’t be overwritten when you update the theme. If you’re new to child themes, you can explore these guides:
https://codex.www.ads-software.com/Child_Themes
https://op111.net/53/
https://vimeo.com/49770088
Make a copy of header.php from Ryu and place it in your child theme folder.
Remove lines 196-200 – note that your line numbers may be different if you previously edited the file:
<li class="search-trigger">
<a href="#" class="genericon" title="<?php esc_attr_e( 'Search', 'ryu' ); ?>">
<span class="screen-reader-text"><?php _e( 'Search', 'ryu' ); ?></span>
</a>
</li>
I tested this on my end and it worked. Let me know how it goes!