remove unused imports, vairables and commented code

from views, and base cookbook and recipes modules

cookbook/signals.py

@@ -1,4 +1,3 @@
-from decimal import Decimal
 from functools import wraps
 
 from django.conf import settings
@@ -13,8 +12,8 @@ from django_scopes import scope, scopes_disabled
 from cookbook.helper.cache_helper import CacheHelper
 from cookbook.helper.shopping_helper import RecipeShoppingEditor
 from cookbook.managers import DICTIONARY
-from cookbook.models import (Food, FoodInheritField, Ingredient, MealPlan, Recipe,
-                             ShoppingListEntry, Step, UserPreference, SearchPreference, SearchFields, Unit, PropertyType)
+from cookbook.models import (Food, MealPlan, PropertyType, Recipe, SearchFields, SearchPreference,
+                             Step, Unit, UserPreference)
 
 SQLITE = True
 if settings.DATABASES['default']['ENGINE'] in ['django.db.backends.postgresql_psycopg2',