I come across "The current page has been customized from its template. Revert to template" issue, I found plenty of google links for this issue, after read some of them I concluded that to hide the message if it has the above bolded text, according to that I can able to hide it with help of HTML form web part.
Coming to my situation the above Revert to template issue popped up more 150 sites.
Solution as off now
Using PowerShell script to add HTML web part into web part page in all the sites (need to work on this).
I just want to know is there any other better solution for this issue?