I suggest removing the talk header if there were actually zero talk page comments other than your own  Id check the article to see what ref style its using and leave the line about refs if the article is using footnotes which I suspect will be nearly all of them that contain any refs and remove it only if a different style is being used   IMO spamming the talkheader template is in the nature of a venial sin  In the future you should use the template when appropriate as for past mistakes it might be worth cleaning them up  but there might well be more important things to do in which case you should focus on the more important work  Unnecessary talk headers can be removed whenever youre otherwise editing a talk page for a real purpose after all