Remove function that takes command-line arguments directly

This function is obsolete now that config-based functions are available.
The command-line parsing should not happen here but in the executable
that uses these functions.

Bug: webrtc:11005
Change-Id: I618d12503123e3e1fd6e572a045372c622043a75
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/167860
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Ivo Creusen <ivoc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30421}