Also cover the async test

tests/test_asyncio/test_connection.py

@@ -549,21 +549,3 @@ async def test_unix_socket_connection_failure():
         str(e.value)
         == "Error 2 connecting to unix:///tmp/a.sock. No such file or directory."
     )
-
-
-@pytest.mark.parametrize(
-    "error, expected_message",
-    [
-        (OSError(), "Error connecting to localhost:6379. Connection reset by peer"),
-        (OSError(12), "Error connecting to localhost:6379. 12."),
-        (
-            OSError(12, "Some Error"),
-            "Error 12 connecting to localhost:6379. [Errno 12] Some Error.",
-        ),
-    ],
-)
-async def test_connect_error_message(error, expected_message):
-    """Test that the _error_message function formats errors correctly"""
-    conn = Connection()
-    error_message = conn._error_message(error)
-    assert error_message == expected_message