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AdminCP / Styles and Templates / Search in Templates
Search

FORUMHOME

enter forumhome template and find in this page

<!-- what's going on box -->

again find

<!-- end what's going on box -->

Delete whatever is between them, which is from

<div id="wgo" class="collapse wgo_block block">

to

{vb:raw template_hook.forumhome_wgo_pos5}
		</div>
	</div>

Or there's another way in which instead of deletion, you can order to hide this division.
Go again to Search in Templates, and search

additional.css

Set Search Titles Only to Yes.
Add this code in the end of additional.css

.wgo_block  {
    visibility: hidden !important;
}

It hides that part.