Thank you for bringing this to our attention. We take all reports of any conduct on our site which falls outside our code seriously.
If that phrase appears in a question, answer, comment or chat, and it was first-time misconduct for a user I would remove it, and send the user a warning.
If it appears in a profile, then I personally think that my action should be the same. However, I'm mindful that many Stack Exchange users believe that they are able to write whatever they like in their own profile, and so I sought peer review from other moderators before deciding whether to proceed with that action.
I have sought that peer review, and this advice, in answer to Is it acceptable to insult god in a user profile?, has guided me to remove that phrase from the GIS SE user profile in which I observed it.
This answer will serve as the warning that the phrase must not be returned to the user's profile.