Open registry editor (regedit)
Follow the path
HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\Global\NGXCore
Double click ShowDlssIndicator
under “Value data” set the value to 0
Click ok and restart PC.
Source https://forums.flightsimulator.com/t/dlss-ver-info-showing-in-game/544407/5?u=tenpatrol