Clarify configuration evidence providers

integrations/ckconfig/contracts_adapter_test.go

@@ -117,13 +117,6 @@ func TestFromConfigKitPassesInvocationValuesAndNativeFacets(t *testing.T) {
 	if _, ok := acquired.Value.Explanation.Explain(path); !ok {
 		t.Fatal("native explanation facet did not resolve /name")
 	}
-	var explanation bytes.Buffer
-	if err := acquired.Value.Explanation.WriteExplanation(&explanation, path); err != nil {
-		t.Fatal(err)
-	}
-	if explanation.Len() == 0 {
-		t.Fatal("native explanation writer produced no output")
-	}
 }
 
 func TestFromConfigKitRetainsLoadErrorAndDiagnostics(t *testing.T) {