remove duplicate cursor def

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

tests/unit/test_client.py

@@ -240,7 +240,6 @@ def test_executing_multiple_commands_uses_the_most_recent_command(self):
         mock_backend = ThriftDatabricksClientMockFactory.new()
         mock_backend.execute_command.side_effect = mock_result_sets
 
-        cursor = client.Cursor(connection=Mock(), backend=mock_backend)
         cursor = client.Cursor(connection=Mock(), backend=mock_backend)
         cursor.execute("SELECT 1;")
         cursor.execute("SELECT 1;")