Fix parsing [a]sync[*] function body modifiers with Fasta.

pkg/analyzer/test/generated/parser_fasta_test.dart

Index: pkg/analyzer/test/generated/parser_fasta_test.dart
diff --git a/pkg/analyzer/test/generated/parser_fasta_test.dart b/pkg/analyzer/test/generated/parser_fasta_test.dart
index ef929d96f1fc3da306bd9c1b0f30b4a9fdba5478..241fb88a23f4066bc227e062e557f10a78d69fe9 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -58,13 +58,6 @@ class ClassMemberParserTest_Fasta extends FastaParserTestCase
   }
 
   @override
-  @assertFailingTest
-  void test_parseAwaitExpression_asStatement_inAsync() {
-    // TODO(paulberry): Add support for async
-    super.test_parseAwaitExpression_asStatement_inAsync();
-  }
-
-  @override
   @failingTest
   void test_parseClassMember_constructor_withInitializers() {
     // TODO(paulberry): 'this' can't be used here.
@@ -510,24 +503,6 @@ class ExpressionParserTest_Fasta extends FastaParserTestCase
 
   @override
   @failingTest
-  void test_parseExpression_function_async() {
-    super.test_parseExpression_function_async();
-  }
-
-  @override
-  @failingTest
-  void test_parseExpression_function_asyncStar() {
-    super.test_parseExpression_function_asyncStar();
-  }
-
-  @override
-  @failingTest
-  void test_parseExpression_function_syncStar() {
-    super.test_parseExpression_function_syncStar();
-  }
-
-  @override
-  @failingTest
   void test_parseExpression_superMethodInvocation_typeArgumentComments() {
     super.test_parseExpression_superMethodInvocation_typeArgumentComments();
   }