remove msg parameter. prevents starting workflow in middle of run.

[valentinedwv]

If we want to start with prune, after a long run of gleaner that got lost due to server restarting, then having to pass a message casues a failure

dagster._core.errors.DagsterExecutionLoadInputError: Error occurred while loading input "msg" of step "harvest_iedadata.iedadata_nabu_prune":