I have inherited a site that has both GTM tags (one Google Ads Remarketing that fires on every page with a Conversion ID but no label, and the Conversion Linker), and the standard conversion script as below.
<script type="text/javascript">
var google_conversion_id = 12345;
var google_custom_params = window.google_tag_params;
var google_remarketing_only = true;
</script>
<script type="text/javascript" src="//www.googleadservices.com/pagead/conversion.js"></script>
Do I need to keep the latter? How do I make sure I don't disrupt the stats if making changes?