How to remove a value from URL parameter?
You need to get the value of the parameter, then check if the parameter contains the nid, then replace/remove the nid on your parameter from your url.

Use this code on your Views: PHP

&lt;?php 
$url = token_replace('[current-page:url]');
$venue =$_GET['field_product_venue'];
if (strpos($venue, $row-&gt;nid) !== false) {
$change= str_replace($row-&gt;nid .',', '', $venue);
$l = l( t('DELETE'), $url,  array('query' =&gt; array('field_product_venue'=&gt;$change)  ));
echo $l;    
}
?&gt;