Function "set_known_sys_dir" no longer exists in workflow

[mkavulich]

Description

PR #666 (go figure) introduced a bug to the workflow generation script that produces some "command not found" error messages due to the "set_known_sys_dir" function no longer existing. It appears as if this is a harmless bug, as these function calls have been superseded by machine-specific logic elsewhere in the code due to that PR, but the calls to this non-existant function should be removed nonetheless to avoid confusion and potential future errors.

Steps to Reproduce

Run any experiment generation script on any machine for any valid config.sh file (without the "EXTRN_MDL_SYSBASEDIR_ICS" and/or "EXTRN_MDL_SYSBASEDIR_LBCS" variables set), observe the following line(s) in the output:

./set_extrn_mdl_params.sh: line 21: set_known_sys_dir: command not found
./set_extrn_mdl_params.sh: line 23: set_known_sys_dir: command not found