Css Help (I think)

Sussex Chef
Hi I’m having trouble with my site.
In the top right of the site I have a news letter signup box that I want to get rid of as I think I would rather have it as a widget that I add to the tool bar(which I have managed to do but now I have two).
in Chrome I right click and inspect element and hover over the news letter and it highlights the following

<div class=”services-box” id=”page-content” style=”width:265px; float:right; margin-top: -35px;”>
<div id=”title-content”>
Newsletter Sign Up
</div>
<div id=”page-text”>

<!– Form by Newsletter Sign-Up v2.0.3 – http://wordpress.org/plugins/newsletter-sign-up/ –>
<form class=”nsu-form” id=”nsu-form-0″ action=”” method=”post”><p><label for=”nsu-email-0″>Newsletter Sign Up</label><input class=”nsu-field” id=”nsu-email-0″ type=”email” name=”nsu_email” placeholder=”Enter Email Address” required=””></p><textarea name=”nsu_robocop” style=”display: none;”></textarea><p><input type=”submit” id=”nsu-submit-0″ class=”nsu-submit” name=”nsu_submit” value=”Subscribe”></p></form>
<!– / Newsletter Sign-Up –>

<p> </p>

</div>
</div>

Can anyone please tell me how I can locate this peace of script so I can delete it? I click delete in the inspect element in chrome so I know is the right piece of script to delete I just cant find the file it’s in

Any help greatly appreciated
Thanks

Ben