Delete check_wflow.py

scripts/check_wflow.py

-from fireworks.utilities.dagflow import DAGFlow
-from fireworks import Workflow
-import sys
-
-assert len(sys.argv) >= 2
-vmode = None
-for arg in sys.argv:
-    if '--view' in arg:
-        vmode = arg.split('=')[1]
-
-wf_file = sys.argv[-1]
-dot_file = wf_file.split('.')[0] + '.dot'
-
-workflow = Workflow.from_file(wf_file)
-dag = DAGFlow.from_fireworks(workflow)
-
-if vmode is not None:
-    dag.add_step_labels()
-    dag.to_dot(dot_file, view=vmode)
-