test(selftest): remove dead ConfigMigrationV21 step superseded by V22

HellionChat/SelfTests/ConfigMigrationV21Step.cs

@@ -1,63 +0,0 @@
-using Dalamud.Bindings.ImGui;
-using Dalamud.Plugin.SelfTest;
-
-namespace HellionChat.SelfTests;
-
-// Pins the post-migration shape of the v21 config. The plugin schema
-// gate stamps Config.Version = 21 right after load, so by the time
-// /xlperf reaches this step the migration must already be complete
-// and the five v21 fields must carry their declared defaults on a
-// fresh install (or the saved values on an existing one). The probe
-// only verifies the version stamp and the field types — it does not
-// rewrite the user's config.
-internal sealed class ConfigMigrationV21Step : ISelfTestStep
-{
-    public ConfigMigrationV21Step(Plugin plugin)
-    {
-        _ = plugin;
-    }
-
-    public string Name => "Hellion Chat - Config v21 migration";
-
-    public SelfTestStepResult RunStep()
-    {
-        if (Plugin.Config.Version != 21)
-        {
-            ImGui.Text($"Config.Version is {Plugin.Config.Version}, expected 21");
-            return SelfTestStepResult.Fail;
-        }
-
-        if (Plugin.Config.MaxParallelPopouts <= 0)
-        {
-            ImGui.Text(
-                $"Config.MaxParallelPopouts is {Plugin.Config.MaxParallelPopouts}, must be > 0"
-            );
-            return SelfTestStepResult.Fail;
-        }
-
-        if (Plugin.Config.SidebarAutoSwitchThresholdPx <= 0)
-        {
-            ImGui.Text(
-                $"Config.SidebarAutoSwitchThresholdPx is {Plugin.Config.SidebarAutoSwitchThresholdPx}, must be > 0"
-            );
-            return SelfTestStepResult.Fail;
-        }
-
-        if (!Enum.IsDefined(Plugin.Config.TellAutoOpenMode))
-        {
-            ImGui.Text($"Config.TellAutoOpenMode {Plugin.Config.TellAutoOpenMode} is out of range");
-            return SelfTestStepResult.Fail;
-        }
-
-        // MainWindowOpen and SettingsWindowOpen are bool — declaration alone
-        // proves the migration emitted them with defaults; reading them
-        // here is just a touch-test that the property is reachable.
-        _ = Plugin.Config.MainWindowOpen;
-        _ = Plugin.Config.SettingsWindowOpen;
-        _ = Plugin.Config.ScreenshotMode;
-
-        return SelfTestStepResult.Pass;
-    }
-
-    public void CleanUp() { }
-}