Removed test as per @graingert's comment

#421 (comment)
> this test can just be removed because it's the same as the above test_time_freeze_coroutine - except the syntax was hidden from 3.4 or lower

tests/test_asyncio.py

@@ -15,17 +15,3 @@ async def frozen_coroutine():
         assert datetime.date.today() == datetime.date(1970, 1, 1)
 
     asyncio.new_event_loop().run_until_complete(frozen_coroutine())
-
-
-def test_time_freeze_async_def():
-    try:
-        exec('async def foo(): pass')
-    except SyntaxError:
-        raise SkipTest('async def not supported')
-    else:
-        exec(dedent('''
-        @freeze_time('1970-01-01')
-        async def frozen_coroutine():
-            assert datetime.date.today() == datetime.date(1970, 1, 1)
-        asyncio.new_event_loop().run_until_complete(frozen_coroutine())
-        '''))