Remove 'skip' status from some of the tests.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 5e083aa0ad9f294b4a7304c36f52986c52110e28..aa5bdcc855f23a6d9cd14bb274f4d22596393c80 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -12,8 +12,8 @@ fixnum/test/int_64_vm_test: Skip
 [$compiler == dart2dart]
 *: Skip
 
-# Don't compiile tests that use dart:io to JS
-[ $compiler == dart2js || $compiler == dart2dart || $compiler == dartc ]
+# Don't compile tests that use dart:io to JS
+[ $compiler == dart2js || $compiler == dart2dart ]
 http/test/*: Skip
 oauth2/test/*: Skip
 
@@ -52,7 +52,7 @@ intl/test/intl_message_basic_example_test: Skip
 unittest/test/mock_regexp_negative_test: Fail
 unittest/test/mock_stepwise_negative_test: Fail
 
-[ $compiler == dart2js || $compiler == dartc ]
+[ $compiler == dart2js ]
 unittest/test/instance_test: Skip
 
 [ $compiler == none && $runtime == drt ]