remove an old test fixture (signalstickers#4)

Author: ioistired

tests/test_download.py

@@ -10,11 +10,6 @@
 pytestmark = pytest.mark.anyio
 
 
-@pytest.fixture
-def client():
-    return
-
-
 def test_download(monkeypatch):
     """
     With a mocked httpx lib, test the whole "download" part.