asc 2.0: omit-trace-statements

Issue: trace() calls not deleted from the release swf file.

I compile the empty test project (release build):

public function Main() 
{
     trace("texttexttext");
}

Command line:

mxmlc Main.as -omit-trace-statements=true -debug=false

Adobe Scout  in "Trace window" has:

texttexttext

-omit-trace-statenemts=true not working in asc 2.0? Tested in AIR 23.0, 25.0, 27.0. No results.