made sure that oberon run a2.txt starts the GUI

git-svn-id: https://svn.inf.ethz.ch/svn/lecturers/a2/trunk@8038 8c9fc860-2736-0410-a75d-ab315db34111

Win32/a2.txt

@@ -4,7 +4,6 @@ Files.AddSearchPath bin~
 Files.AddSearchPath ../source~
 Files.SetWorkPath work~
 Configuration.Init~
-Machine.SetTraceFile~
 FSTools.Mount WORK RelativeFileSystem Work~
 Display.Install ~
 WindowManager.Install ~