fixup: remove XXX mark

Author: Totktonada

graphql/bfs_executor.lua

@@ -365,7 +365,6 @@ local function invoke_resolve(prepared_object, variables, opts)
     local open_set = {}
 
     for field_name, field_info in pairs(prepared_object.fields_info) do
-        -- XXX: don't call :invoke() for is_item_cache_only
         local object_or_list
         if field_info.prepared_resolve.is_calculated then
             object_or_list = field_info.prepared_resolve.objs