Ability to "un-plan" a planned task or return it to the Inbox

I've realized that I need the "Someday" feature within the PLAN menu and not just the SNOOZE menu.

I prefer Plan over Snooze because Snooze will hide tasks from my upcoming views (which I do not like).

If I have items planned for today, and throughout the day I determine that the item won't get done, I really want a quick way to "unplan" the task from the plan menu and return it to the inbox.

i.e. From the Plan menu, rather than type "Next Monday", allow me to type "Inbox" or "Remove" or "None" to remove the planned date and return it to the inbox.