Remove comment in tests

Author: elacuesta

tests/conftest.py

@@ -6,8 +6,7 @@
 in pytest>=5.4.0 (pytest.Function.from_parent).
 
 In the context of scrapy-playwright, this allows to unpin the outdated pytest<5.4.0 dependency,
-while keeping pytest-asyncio==0.10, as pytest-asyncio>=0.11 currently breaks tests
-(likely to be because of https://github.com/pytest-dev/pytest-asyncio/issues/157).
+while keeping pytest-asyncio==0.10, as pytest-asyncio>=0.11 currently breaks tests.
 """