PEP style fixes

InvenTree/build/forms.py

@@ -33,10 +33,10 @@ class EditBuildForm(HelperForm):
     }
 
     target_date = forms.DateField(
-        widget=forms.DateInput(     
-            attrs={'type': 'date'} 
+        widget=forms.DateInput(
+            attrs={'type': 'date'}
         )
-    )   
+    )
 
     class Meta:
         model = Build

InvenTree/build/serializers.py

@@ -5,16 +5,12 @@ JSON serializers for Build API
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-import datetime
-
-from django.db.models import Q
 from django.db.models import Case, When, Value
 from django.db.models import BooleanField
 
 from rest_framework import serializers
 
 from InvenTree.serializers import InvenTreeModelSerializer
-from InvenTree.status_codes import BuildStatus
 
 from stock.serializers import StockItemSerializerBrief
 from part.serializers import PartBriefSerializer
@@ -59,7 +55,6 @@ class BuildSerializer(InvenTreeModelSerializer):
 
         return queryset
 
-
     def __init__(self, *args, **kwargs):
         part_detail = kwargs.pop('part_detail', False)