CRF: remove skip to cover <0.4.17

Older greenlet it was just working incidentally,
but we're still testing that nothing else breaks it

diff --git a/test/base/test_concurrency_py3k.py b/test/base/test_concurrency_py3k.py
index 44a9337d63d160af7cd52e74f3c7a66751f4c5a1..1f9fb1b3ea0c95ba75aae1466d58c3fbf214fc8d 100644 (file)
--- a/test/base/test_concurrency_py3k.py
+++ b/test/base/test_concurrency_py3k.py
@@ -110,7 +110,6 @@ class TestAsyncioCompat(fixtures.TestBase):
 
     @async_test
     @testing.requires.python37
-    @testing.skip_if(lambda: not hasattr(greenlet, "gr_context"))
     async def test_contextvars(self):
         import asyncio
         import contextvars