fix duplicated code from merg

Author: mohnjiles

StabilityMatrix.Core/Models/Packages/ForgeClassic.cs

@@ -185,10 +185,6 @@ await requirements.ReadAllTextAsync(cancellationToken).ConfigureAwait(false)
             SettingsManager.Settings.PreferredGpu?.IsLegacyNvidiaGpu() ?? HardwareHelper.HasLegacyNvidiaGpu();
         var torchExtraIndex = isLegacyNvidia ? "cu126" : "cu128";
 
-        var isLegacyNvidia =
-            SettingsManager.Settings.PreferredGpu?.IsLegacyNvidiaGpu() ?? HardwareHelper.HasLegacyNvidiaGpu();
-        var torchExtraIndex = isLegacyNvidia ? "cu126" : "cu128";
-
         var pipArgs = new PipInstallArgs()
             .AddArg("--upgrade")
             .WithTorch()