No.

wagtail/wagtailcore/blocks/struct_block.py

@@ -74,8 +74,6 @@ class BaseStructBlock(Block):
             for child_rendering in child_renderings
         ])
 
-       
-        # Can these be rendered with a template?
         if self.label:
             return format_html('<div class="struct-block"><label>{0}</label> <ul>{1}</ul></div>', self.label, list_items)
         else: