Remove unused combination evidence and helpers

internal/engine/inheritance_identified_test.go

@@ -198,11 +198,6 @@ func TestIdentifiedInheritanceResolvesNestedCollectionsAtEachDestination(t *test
 	if _, found := expanded.origins["/jobs/0/steps/1/value"]; !found {
 		t.Fatal("nested inherited value did not retain its destination origin")
 	}
-	for _, replacement := range expanded.replacements {
-		if replacement.path.String() == "/jobs/0/id" {
-			t.Fatal("parent identity was treated as payload replaced by the child's identity")
-		}
-	}
 }
 
 func TestIdentifiedInheritanceRespectsOutputNodeBudget(t *testing.T) {