bitbake: toaster: remove unused import

Fixed pylint warning:
    Unused Build imported from orm.models (unused-import)

(Bitbake rev: 30585f7e37966e827861c25a0cc3bf9e3bd2f667)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/tests.py

@@ -1,6 +1,6 @@
 from django.test import TestCase
 from django.core.urlresolvers import reverse
-from orm.models import Project, Release, BitbakeVersion, Build
+from orm.models import Project, Release, BitbakeVersion
 from orm.models import ReleaseLayerSourcePriority, LayerSource, Layer
 from orm.models import Layer_Version, Recipe, Machine, ProjectLayer
 import json