Remove thumbnail generation from process

Closes #1715 (closed)

arkindex/process/tests/test_create_process.py

@@ -490,11 +490,11 @@ class TestCreateProcess(FixtureAPITestCase):
         self.assertFalse(process.tasks.exists())
         self.assertEqual(process.elements.get(), page)
 
+        # The process needs to be started to produce a workflow
         process.worker_runs.create(
             version=self.version_1
         )
 
-        # The process needs to be started to produce a workflow
         response = self.client.post(
             reverse("api:process-start", kwargs={"pk": str(process.id)}),
             # The process needs a worker run or thumbnails generation to start