Removed schedule event

Details:

* Removed the 'schedule' event from the test workflow since it is
  only triggered on the master branch.

Signed-off-by: Andreas Maier <maiera@de.ibm.com>

.github/workflows/test.yml

@@ -4,9 +4,7 @@
 name: test
 
 on:
-  # schedule:
-  # # minute hour day_of_month month day_of_week
-  # - cron:  '10 21 * * 0'  # Every sunday at 21:10 UTC
+  # Note: The 'schedule' event is only triggering on the master branch.
   push:
     branches: [ master, stable_0.8 ]
   pull_request: