No. Legitimate Steam games downloaded directly from Valve will never contain steam-rld.ini . If you find it in a SteamApps\common folder for a game you paid for, your copy has been tampered with. Verify your game files via Steam (Properties > Local Files > Verify integrity) to remove it.
: It allows users to set a custom UserName , which is then used by the emulator to create local save data paths. steam-rld.ini
Even if you downloaded a game years ago, finding this file on your PC today should raise red flags: Local Files >