This is the section in your source output:
<!-- search -->
<div class="searchform-container">
<form class="searchform" method="get" action="https://www.sewmamasew.com">
<input type="text" name="s" class="s" size="30" value="Search website..." onfocus="if (this.value = '') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Search website...';}" /><input type="submit" class="searchSubmit" value="" />
</form>
</div>
<!-- banner -->
<a class="banner" href="/category/tutorials/">
<img src="https://www.sewmamasew.com/blog2/January2014/sewtut580.jpg"/>
</a>
</div>
I’d guess it’s in your Header template, though maybe it’s injected by the theme functions instead.
As that is a commercial theme, we ask that you please go to their official support channel. In order to be good stewards of the WordPress community, and encourage innovation and progress, we feel it’s important to direct people to those official locations.
https://dannci.freshdesk.com/support/home
Forum volunteers are also not given access to commercial products, so they would not know how your commercial theme operates. This is one other reason why volunteers forward you to the commercial product’s vendors. The vendors are responsible for supporting their commercial product.