diff --git a/src/LibChorus/Model/ServerSettingsModel.cs b/src/LibChorus/Model/ServerSettingsModel.cs
index 71e4ceef..f97b7a91 100644
--- a/src/LibChorus/Model/ServerSettingsModel.cs
+++ b/src/LibChorus/Model/ServerSettingsModel.cs
@@ -35,9 +35,6 @@ public static string LanguageForgeServer
 			}
 		}
 
-		[Obsolete("no known clients")]
-		public static bool IsQaServer => !string.IsNullOrEmpty(Environment.GetEnvironmentVariable(ServerEnvVar));
-
 		public static bool IsPrivateServer { get; set; }
 
 		private const string EntropyValue = "LAMED videte si est dolor sicut dolor meus";