Do not assert on classification confidence

arkindex_worker/worker.py

@@ -332,7 +332,7 @@ class ElementsWorker(BaseWorker):
             ml_class, str
         ), "ml_class shouldn't be null and should be of type str"
         assert (
-            confidence and isinstance(confidence, float) and 0 <= confidence <= 1
+            isinstance(confidence, float) and 0 <= confidence <= 1
         ), "confidence shouldn't be null and should be a float in [0..1] range"
         assert isinstance(
             high_confidence, bool