Revert "dart2js cps: 'is' checks on types with type arguments."

tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart

Index: tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart
diff --git a/tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart b/tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart
index 211d52659ecfba53a2f05928e52d322d43af0f8c..2c8ff499e89ba8fe5003e8277265e7d9f3aaaba2 100644
--- a/tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart
+++ b/tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart
@@ -564,14 +564,11 @@ class SExpressionUnstringifier {
 
     dart_types.DartType type = new DummyNamedType(tokens.read());
 
-    List<ir.Primitive> typeArguments = parsePrimitiveList();
-
     Continuation cont = name2variable[tokens.read()];
     assert(cont != null);
 
     tokens.consumeEnd();
-    return new TypeOperator(recv, type, typeArguments, cont,
-                            isTypeTest: operator == 'is');
+    return new TypeOperator(recv, type, cont, isTypeTest: operator == 'is');
   }
 
   /// (SetStatic field value body)