How to disable seeing the design sync command line notices about logging and 3dexperience

I'm am trying to use the dss command line operations to perform some tasks in scripting, but every command execution starts with the same 3 lines that are unnecessary.  

  1. Logging to a dss log file in my workarea
  2. 3DEXPERIENCE R2021x
  3. Blank line.

 

How do I turn these off?  Can I do it generally in the UserRegistry?