Remove summoner names

I been searching for the web but I can't find an answer. I want to hide summoner name from the game specifically from a replay. I can hide them almost everywhere except from the announcer notifications (player213213 killed pepito513).

Does anybody knows how ?

I know is possible because 've seen it before.

THANKS!

The chat can be easily removed you are right and thanks but...
I'm talking about this (where it says Syrian el father is on rampage in the middle of the screen not the chat)