How to delete code line

[Kamileurocentrum]

Hi. 

Recently, a developer with whom I unfortunately lost contact, added a code to the website that I now have to remove. Can you guess where this line might be?

Its not in footer (after </footer> but still before </body>

I checked custom html modules but its not in there

https://airclinic.pl/

Line 1853

<a title="Live chat" class="czater" style="cursor: pointer !important;" onclick=" var language=window.navigator.userLanguage || window.navigator.language; window.open('https://www.czater.pl/chat/getExtracted/130ddc594137d53d7196a694fc006b68b693c89e/' + language + '', '_blank', 'titlebar=0,toolbar=0,location=0,directories=0,menubar=0,status=0,resizable=0,width=300,height=365');" > <img style="zoom: 0.4; zoom: 0.4;-ms-zoom: 0.4;-webkit-zoom: 0.4;-moz-transform: scale(0.4,0.4);-moz-transform-origin: left center;border-radius: 0px;" alt="Czater" src="https://www.czater.pl/chat/getStatusImage/130ddc594137d53d7196a694fc006b68b693c89e/1" > </a>

Edited February 7, 2023 by Kamileurocentrum (see edit history)

[endriu107]

As probaly you are from poland this is my tutorial in Polish language how you can find file with any code https://www.youtube.com/watch?v=2wJpkoMBsyI