About changes to DefaultEngine.ini which you add to work with Steam overlay

Hello, I want to ask about changes to DefaultEngine.ini, different guides said that I need to add

[/script/engine.gameengine]
!NetDriverDefinitions=ClearArray
+NetDriverDefinitions=(DefName=“GameNetDriver”,DriverClassName="/Script/OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="/Script/OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Steam
PollingIntervalInMs=20

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=
SteamAppId=
GameServerQueryPort=27015
bRelaunchInSteam=false
GameVersion=1.0.0.0
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90[/script/onlinesubsystemsteam.steamnetdriver]
NetConnectionClassName="/Script/OnlineSubsystemSteam.SteamNetConnection"

but nothing about it. If I have 1p offline game, can I remove

GameServerQueryPort=27015
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90

and what is this

bEnabled=true
bRelaunchInSteam=false