Step 2) "Long-press" on any event item in the screen
You will see a context menu pop-up with "Calendar sync (create)" menu.
Here the "create" means the selected event is never published to Google Calendar.
Step 3) Select the "Calendar sync (create)"
Now, you see "Calendar event created" message.
Step 4) Go to Google Calendar and check if the event is really published.
Step 5) "Long-press" again on the same event you selected in Step 2
At this time, you will see "Calendar sync (update, delete)"
This means the event is already synced to Calendar and ready to be updated or removed.
Step 6) Select the "Calendar sync (update, delete)" and select "delete"
Now, you see "Calendar event deleted" message.
Step 7) Go to Google Calendar and check if the event is really removed.
