Wie geht die graue Linie weg im Header?

Hello Thomas, 

I'm working on the J5 migration and while fiddeling around with custom CSS, I ran against an issue I can't get my finger on how to resolve that. 
Examples on both old site www.dedrieuiltjes.nl/ and new site  j5.dedrieuiltjes.nl/
On both websites there is a gray line under the header and on top of the menu which I want to suppress. 
Do you know what overwrite statements I should use to get this done? 
Or can't this be done?

It think it has something to do with this part of the html:
<div id="logo"> </div>
<div id="logo">&nbsp</div>  
<div id="logo">&nbsp</div>

Can you help me with this?
Thanks already!

Best regards,

Rob van Baal

There are two things at play here. First one is the <p> tag in your custom module has a bottom margin. Either switch to <div> or use
Then the second one comes from the template design. You can remove that remaining line like this:

Hallo Thomas, 
Das Problem hat sich mit deine Hilfe einwandfrei gelöst. 
Es sieht jetzt viel besser aus.
Vielen Dank für deine Hilfe.
Grüße aus der Niederlande.
Rob van Baal