Remove H2 titles from sidebar widgets list

Edit the widgets and remove the title from the “Title:” field and save the widget.

– Pranav
https://www.pranavrastogi.com

What .php document I need to edit the widget?
thanks!

obviously I thought the same as you say, but the question is HOW.

What archive I have to edit?
Where is the line code where I have to remove something?

I tried about 5 hours, editing sidebar.php, deleting something that I presumed that was the H2 title but is not.

The titles are still visible.. ; (

Can you paste the code here?