Do not show empty foods for amica menus

amica.py

                 food = []
                 for meal in meals:
                     food.append(format_meal_allergies(meal))
-                current_day_foods.append("\n".join(food))
+                if food:
+                    current_day_foods.append("\n".join(food))
         week_foods[week_day] = current_day_foods
     return week_foods