analyze_outcomes: print task list directly to stdout

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index 105a4aa..f1680ad 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -679,8 +679,7 @@
 
         if options.list:
             for task in KNOWN_TASKS:
-                main_log.info(task)
-            main_log.print_output()
+                print(task)
             sys.exit(0)
 
         if options.specified_tasks == 'all':