If you would like to stop using Daddy Analytics, and you have setup Daddy Analytics to work with your Wordpress to Lead plugin, you will need to delete the contents of three fields in your plugin, and then save that page. By doing so, Daddy Analytics code will no longer appear on your website.
The names of the three fields you need to clear the contents of are:
Daddy Analytics Token
Daddy Analytics Webform URL
Daddy Analytics Site ID
The screenshot below shows these fields as well.