How can I turn off the new version notification?

I am a person who is building QGC using QT.
My question is this.
An alarm that appears when QGC is executed. (Notice of new version)
I want disable this notification.
We will be fixing the version of QGC to one, and we want to prevent future upgrades.
It is based on QGC Stable V4.1,
What part can be modified?

When in doubt grep it out.

How should I understand?

In qt search the string and it will pop up which file its in. Then comment it out and it won’t pop up. I did this awhile ago to all the custom builds.