[Request] Classic WoW hiding "Screen Captured" message

[Lumenie]

Hi all, I was hoping someone would be able to direct me to either an addon or ini setting which hides the yellow "Screen Captured" message that pops up in the middle of the screen when a screenshot is captured in-game. I take lots of screenshots and would rather not use a third-party program to do so, but the message is distracting and immersion-breaking.

Thanks for any help/advice!