Bug 1523562 [wpt PR 14895] - Remove pytest-catchlog dependency, a=testonly

Automatic update from web-platform-tests
Remove pytest-catchlog dependency (#14895)

Running the tests currently shows this warning:
> PytestWarning: pytest-catchlog plugin has been merged into the core, please remove it from your requirements.
--

wpt-commits: 8aaeb8897fa3bd2a97751a22faf6dd3da3ab32aa
wpt-pr: 14895

testing/web-platform/tests/tools/tox.ini

@@ -8,7 +8,6 @@ deps =
   pytest-cov
   mock
   hypothesis
-  pytest-catchlog
 
 commands = pytest --cov {posargs}