Get rid of promotedType=none annotations

pkg/front_end/testcases/inference/generic_methods_inference_error.dart

 // Copyright (c) 2017, 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.
 
 /*@testedFeatures=inference*/
 library test;
 
 main() {
   List<String> y;
-  Iterable<String> x = /*@promotedType=none*/ y
-      . /*@typeArgs=String*/ /*@target=List::map*/ map(
-          /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ /*@returnType=double*/ (String
-                  z) =>
-              1.0);
+  Iterable<String> x = y. /*@typeArgs=String*/ /*@target=List::map*/ map(
+      /*error:ARGUMENT_TYPE_NOT_ASSIGNABLE*/ /*@returnType=double*/ (String
+              z) =>
+          1.0);
 }