Remove commented dead code (#3977)

This was introduced in 2018 in commit
fd8ce2e
already commented-out.


# Changed Behaviour

none

## Type of change

- Code maintenance/cleanup

Author: benclifford

parsl/tests/test_checkpointing/test_regression_233.py

@@ -5,7 +5,6 @@
 
 
 def run_checkpointed(checkpoints):
-    # set_stream_logger()
     from parsl.tests.configs.local_threads_checkpoint_task_exit import config
     config.checkpoint_files = checkpoints
     dfk = DataFlowKernel(config=config)