Remove failures

pkg/dev_compiler/test/browser/language_tests.js

 // 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.
 
 define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       function(dart_sdk, async_helper, expect, unittest, is, require) {
   'use strict';
 
   async_helper = async_helper.async_helper;
   let minitest = expect.minitest;
@@ skipping 176 matching lines @@
       'numbers_test': fail,
       'redirecting_factory_reflection_test': fail,
       'reg_exp_test': whitelist,
       'regress_16640_test': fail,
       'regress_18535_test': fail,
       'regress_22445_test': fail,
       'regress_22666_test': fail,
       'regress_22777_test': flaky,
       'stack_overflow_stacktrace_test': fail,
       'stack_overflow_test': fail,
-
-      // https://github.com/dart-lang/sdk/issues/30075
-      'stacktrace_rethrow_error_test_withtraceparameter_multi': fail,
-      'stacktrace_rethrow_nonerror_test': fail,
-
       'stacktrace_test': chrome_fail,
       'string_interpolate_null_test': fail,
       'switch_label2_test': fail,
       'switch_label_test': fail,
       'switch_try_catch_test': fail,
       'throwing_lazy_variable_test': fail,
       'truncdiv_test': fail,  // did not throw
       'try_catch_on_syntax_test_10_multi': fail,
       'try_catch_on_syntax_test_11_multi': fail,
       'type_variable_nested_test': fail,
@@ skipping 701 matching lines @@
 
     for (let action of unittest_tests) {
       try {
         action();
       } catch (e) {
         console.error("Caught error tying to setup test:", e);
       }
     }
   });
 });