Have you ever needed to do something custom to the standard/default WordPress RSS Widget? If you haven’t, then you are not doing WordPress to it’s fullest.
So, if you by accident want to change the standard/default WordPress widget that displays RSS feeds so that the widget no longer displays a title, do the following. You should just not add a title in the widget itself, but I have noticed sometimes the database or WordPress likes to think you put something, so to fix the small bug.
Custom RSS Widget for WordPress
Open the file \wp-includes\default-widgets.php
Go down to lines around 750-800; I personally just search for “rss.png” or whatever function I am looking for. Now just change
if ( $title )
if ( $title == "")
Save the file, upload to your site, and you are good to go.
The image attached is very crude, but you get the idea.
Disclaimer: Of course, there are plugins that will do this, but if I can get away without using additional plugins and learning something in the process – I tend to do it myself.