Ingredients can now be remove from shopping list when a recipe is unscheduled.

backend/src/translation.rs

@@ -146,6 +146,7 @@ pub enum Sentence {
     CalendarAddToPlannerAlreadyExists,
     CalendarDateFormat, // See https://docs.rs/chrono/latest/chrono/format/strftime/index.html.
     CalendarAddIngredientsToShoppingList,
+    CalendarRemoveIngredientsFromShoppingList,
     CalendarUnscheduleConfirmation,
 }