Allow resizing sub elements

I don't understand why workers aren't allowed to resize sub elements. This seems like an old behaviour (the code is like 3 years old) so it might have made sense then. 9fbb705a introduced image resizing on both width and height, we want to use it on subelements too.

arkindex_worker/models.py

@@ -187,20 +187,9 @@ class Element(MagicDict):
         if max_width is None and max_height is None:
             resize = "full"
         else:
-            bounding_box = polygon_bounding_box(self.zone.polygon)
             original_size = {"w": self.zone.image.width, "h": self.zone.image.height}
-            # No resizing if the element is smaller than the image.
-            if (
-                bounding_box.width != original_size["w"]
-                or bounding_box.height != original_size["h"]
-            ):
-                resize = "full"
-                logger.warning(
-                    "Only full image size elements covered, "
-                    + "downloading full size image."
-                )
             # No resizing if the image is smaller than the wanted size.
-            elif (max_width is None or original_size["w"] <= max_width) and (
+            if (max_width is None or original_size["w"] <= max_width) and (
                 max_height is None or original_size["h"] <= max_height
             ):
                 resize = "full"