fix(launcher): harden Campaign LA11 gate evidence

src/AcDream.Launcher/LauncherStartupOptions.cs

@@ -9,7 +9,6 @@ internal enum LauncherStartupMode
     VerifyPublish,
     SelfUpdateHelper,
     SelfUpdateConfirmation,
-    SelfUpdateDeferred,
 }
 
 /// <summary>
@@ -19,12 +18,6 @@ internal enum LauncherStartupMode
 /// </summary>
 internal sealed class LauncherStartupOptions
 {
-    // This prefix is consumed only after LauncherSelfUpdateBootstrap has
-    // already decided to continue after a recovered rollback. Keep it local
-    // so the process-level bootstrap can remain internal to Launcher.Core.
-    private const string DeferredSelfUpdateArgument =
-        "--acdream-self-update-deferred-v1";
-
     private readonly IReadOnlyList<string> _publicArguments;
 
     private LauncherStartupOptions(
@@ -213,14 +206,6 @@ internal sealed class LauncherStartupOptions
                 arguments.Count >= 2 ? 2 : arguments.Count);
         }
 
-        if (string.Equals(
-                arguments[0],
-                DeferredSelfUpdateArgument,
-                StringComparison.Ordinal))
-        {
-            return (LauncherStartupMode.SelfUpdateDeferred, 1);
-        }
-
         return (LauncherStartupMode.Desktop, 0);
     }