Not so much. Changing digital branding on LCDs is not something I've seen done, you'd have to get the LCD into some kind of program mode and hook it up to another computer in a way that let you poke around the screen's bios I imagine. I'm totally talking out of ---my bottom---, but in a somewhat informed way.
or, poke around the menus and see if there is an option (there isn't).
If you're that OCD and need to never see it again build a rolling panel blind that is matte black, on rails between the bezel and the monitor. Use an micro-controller and some servos/steppers. Program it to roll up some many seconds after power on and to roll down at power off. You'll need some capacitor in there somewhere so it can have enough charge to roll down at power off. And limit switches so it doesn't burn out.
Or just blink real hard when you power it on.
Or put a curtain over the front with a pull handle like on an old school toilet and pull the curtain back after you've powered on.
Or...