PEP style fixes

InvenTree/stock/api.py

@@ -107,6 +107,7 @@ class StockItemContextMixin:
 
         return context
 
+
 class StockItemSerialize(StockItemContextMixin, generics.CreateAPIView):
     """
     API endpoint for serializing a stock item

InvenTree/stock/forms.py

@@ -5,17 +5,9 @@ Django Forms for interacting with Stock app
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django import forms
-from django.forms.utils import ErrorDict
-from django.utils.translation import gettext_lazy as _
-
-from mptt.fields import TreeNodeChoiceField
-
 from InvenTree.forms import HelperForm
-from InvenTree.fields import RoundingDecimalFormField
-from InvenTree.fields import DatePickerFormField
 
-from .models import StockLocation, StockItem, StockItemTracking
+from .models import StockItem, StockItemTracking
 
 
 class ReturnStockItemForm(HelperForm):

InvenTree/stock/views.py

@@ -5,6 +5,7 @@ Django views for interacting with Stock app
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+from datetime import datetime
 
 from django.views.generic import DetailView, ListView
 from django.urls import reverse