test: remove vacuous diagnostic assertions

tests/AcDream.Core.Tests/Physics/DoorCollisionApparatusTests.cs

@@ -203,6 +203,7 @@ public class DoorCollisionApparatusTests
     /// without yielding a green/red verdict.
     /// </summary>
     [Fact]
+    [Trait("Purpose", "Diagnostic")]
     public void Apparatus_DiagnosticDump_FrontApproach()
     {
         if (!TryBuildScenario(out var ctx)) Assert.Fail("Lane=InstalledDat requires an installed retail DAT directory; see docs/release-gate.md.");
@@ -236,7 +237,6 @@ public class DoorCollisionApparatusTests
                 isOnGround = result.IsOnGround;
             }
 
-            Assert.True(true, "Diagnostic test — always passes; check stdout.");
         }
         finally
         {