chore: remove unused redisUrl field from LobbyConfig

Author: TheBjoRedCraft

src/main/kotlin/dev/slne/surf/lobby/config/LobbyConfig.kt

@@ -8,8 +8,6 @@ data class LobbyConfig(
     val spawnPoint: LocationConfig = LocationConfig.default(),
     val survivalNpc: LocationConfig = LocationConfig.default(),
     val eventNpc: LocationConfig = LocationConfig.default(),
-
-    val redisUrl: String = "redis://localhost:6379",
 ) {
     @ConfigSerializable
     data class LocationConfig(