Revert "Add support for the new function-type syntax."

pkg/compiler/lib/src/js_backend/no_such_method_registry.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers, Names, Selectors;
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
 import '../tree/tree.dart';
 import 'backend.dart';
@@ skipping 201 matching lines @@
     } else if (body is Block &&
         !body.statements.isEmpty &&
         body.statements.nodes.tail.isEmpty) {
       Statement stmt = body.statements.nodes.head;
       if (stmt is Return && stmt.hasExpression) {
         expr = stmt.expression;
       }
     }
     if (expr is Send && expr.isTypeCast) {
       Send sendExpr = expr;
-      var typeAnnotation = sendExpr.typeAnnotationFromIsCheckOrCast;
-      var typeName = typeAnnotation.asNominalTypeAnnotation()?.typeName;
+      var typeName = sendExpr.typeAnnotationFromIsCheckOrCast.typeName;
       if (typeName is Identifier && typeName.source == "dynamic") {
         expr = sendExpr.receiver;
       }
     }
     if (expr is Send &&
         expr.isSuperCall &&
         expr.selector is Identifier &&
         (expr.selector as Identifier).source == Identifiers.noSuchMethod_) {
       var arg = expr.arguments.head;
       if (expr.arguments.tail.isEmpty &&
@@ skipping 33 matching lines @@
     return false;
   }
 }
 
 enum NsmCategory {
   DEFAULT,
   THROWING,
   NOT_APPLICABLE,
   OTHER,
 }