fixes #28236, generic methods should not cause warnings in Dart 1

tests/lib/lib.status

 # Copyright (c) 2012, 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.
 
 [ $unchecked ]
 mirrors/redirecting_factory_different_type_test: SkipByDesign # Tests type checks.
 
 [ $compiler == dart2js ]
 async/schedule_microtask6_test: RuntimeError # global error handling is not supported. Issue 5958
 
@@ skipping 315 matching lines @@
 mirrors/removed_api_test: StaticWarning, OK # Deliberately refers to undeclared members.
 mirrors/deferred_type_test: StaticWarning, OK # Deliberately referes to a deferred type in a declaration.
 
 mirrors/deferred_mirrors_metadata_test: Fail # Issue 17522
 
 developer/metrics_test: Fail # Issue 20309
 developer/metrics_num_test: Fail # Issue 20309
 profiler/metrics_test: Fail # Issue 20309
 profiler/metrics_num_test: Fail # Issue 20309
 
-# Issue #28236
-async/first_regression_test: StaticWarning
-async/future_timeout_test: StaticWarning
-async/multiple_timer_test: StaticWarning
-async/schedule_microtask2_test: StaticWarning
-async/schedule_microtask3_test: StaticWarning
-async/schedule_microtask5_test: StaticWarning
-async/stream_controller_async_test: StaticWarning
-async/stream_first_where_test: StaticWarning
-async/stream_from_iterable_test: StaticWarning
-async/stream_iterator_test: StaticWarning
-async/stream_join_test: StaticWarning
-async/stream_last_where_test: StaticWarning
-async/stream_periodic2_test: StaticWarning
-async/stream_periodic3_test: StaticWarning
-async/stream_periodic4_test: StaticWarning
-async/stream_periodic5_test: StaticWarning
-async/stream_periodic6_test: StaticWarning
-async/stream_periodic_test: StaticWarning
-async/stream_single_test: StaticWarning
-async/stream_single_to_multi_subscriber_test: StaticWarning
-async/stream_state_nonzero_timer_test: StaticWarning
-async/stream_state_test: StaticWarning
-async/stream_subscription_as_future_test: StaticWarning
-async/stream_subscription_cancel_test: StaticWarning
-async/stream_timeout_test: StaticWarning
-async/stream_transform_test: StaticWarning
-async/stream_transformation_broadcast_test: StaticWarning
-async/timer_cancel1_test: StaticWarning
-async/timer_cancel2_test: StaticWarning
-async/timer_cancel_test: StaticWarning
-async/timer_isActive_test: StaticWarning
-async/timer_repeat_test: StaticWarning
-async/timer_test: StaticWarning
-convert/json_lib_test: StaticWarning
-js/null_test: StaticWarning
-math/point_test: StaticWarning
-math/rectangle_test: StaticWarning
-mirrors/library_uri_io_test: StaticWarning
-mirrors/library_uri_package_test: StaticWarning
-
 
 [ ($compiler == dartanalyzer || $compiler == dart2analyzer) && $checked ]
 mirrors/regress_16321_test/01: MissingCompileTimeError # Issue 16391
 
 [ $compiler == dart2js && $runtime == d8 && $system == windows ]
 async/*deferred*: Pass,RuntimeError # Issue 17458
 mirrors/*deferred*: Pass,RuntimeError # Issue 17458
 
 [ $compiler == dart2js && $mode == debug ]
 mirrors/native_class_test: Pass, Slow
@@ skipping 76 matching lines @@
 mirrors/typedef_deferred_library_test: Crash # Deferred loading
 mirrors/deferred_mirrors_update_test: Crash # Deferred loading
 mirrors/deferred_mirrors_metadata_test: Crash # Deferred loading
 mirrors/deferred_mirrors_metatarget_test: Crash # Deferred loading
 mirrors/load_library_test: Crash # Deferred loading
 
 [ $hot_reload ]
 mirrors/generic_bounded_test/02: Fail # Type equality - Issue 26869
 mirrors/generic_bounded_by_type_parameter_test/02: Fail # Type equality - Issue 26869
 async/timer_regress22626_test: Pass, RuntimeError # Timing dependent.