Removed "notSelected" value of multiple enums

lib/src/enums.dart

@@ -16,7 +16,6 @@ enum Difficulty {
 }
 
 enum IngredientType {
-  notSelected,
   vegetable,
   meat,
   fish,
@@ -29,7 +28,6 @@ enum IngredientType {
 }
 
 enum MealCategory {
-  notSelected,
   // Main Meals
   breakfast,
   brunch,
@@ -46,7 +44,6 @@ enum MealCategory {
 }
 
 enum Cuisine {
-  notSelected,
   // Asian Cuisines
   chinese,
   japanese,