It also depend on your method of verification of propeller ads. we have verified by uploading file on http://www.releasedateonline.com if you have uploaded file in root folder just delete it, or if you have added verification code it looks like this
<meta name=”propeller” content=”d4f1c671c97effb1f86ce6fc0bcae2d0″ />
Delete it from header.php
It also depend on your method of verification of propeller ads. if you have uploaded file in root folder just delete it.
I also Had in the http://www.releasedateonline.com i managed to remove after removing Header code in header.php