Issue 25733. Built-in itentifiers are not permitted as prefixes.

pkg/analyzer/test/generated/non_error_resolver_test.dart

Index: pkg/analyzer/test/generated/non_error_resolver_test.dart
diff --git a/pkg/analyzer/test/generated/non_error_resolver_test.dart b/pkg/analyzer/test/generated/non_error_resolver_test.dart
index 21568ccad124d3b0aa1e90b79f01e8a7818bdb0e..f9c5a45f0b522faa2fff2fcbeeada1fee9bc576e 100644
--- a/pkg/analyzer/test/generated/non_error_resolver_test.dart
+++ b/pkg/analyzer/test/generated/non_error_resolver_test.dart
@@ -2195,17 +2195,6 @@ class B {
     verify([source]);
   }
 
-  test_implicitThisReferenceInInitializer_importPrefix() async {
-    Source source = addSource(r'''
-import 'dart:async' as abstract;
-class A {
-  var v = new abstract.Completer();
-}''');
-    await computeAnalysisResult(source);
-    assertNoErrors(source);
-    verify([source]);
-  }
-
   test_implicitThisReferenceInInitializer_prefixedIdentifier() async {
     Source source = addSource(r'''
 class A {