PEP style fixes

InvenTree/build/models.py

@@ -486,7 +486,7 @@ class Build(MPTTModel, ReferenceIndexingMixin):
 
         for output in self.complete_outputs:
             quantity += output.quantity
-        
+
         return quantity
 
     @property

InvenTree/build/views.py

@@ -9,11 +9,9 @@ from django.utils.translation import gettext_lazy as _
 from django.views.generic import DetailView, ListView
 
 from .models import Build
-from . import forms
 
-from InvenTree.views import AjaxUpdateView, AjaxDeleteView
+from InvenTree.views import AjaxDeleteView
 from InvenTree.views import InvenTreeRoleMixin
-from InvenTree.helpers import str2bool
 from InvenTree.status_codes import BuildStatus