update rss_proxy.py

* removed guid rewrite

proxy/rss_proxy.py

@@ -78,6 +78,10 @@ def init_proxy(app):
             new_items = []
 
             for item in items:
+                guid = item.find("guid")
+                if guid is None or not guid.text:
+                    continue
+
                 cache_key = f"rss:item:{guid.text}"
                 cached_item = rdb.get(cache_key)
 
@@ -88,7 +92,6 @@ def init_proxy(app):
                 if cached_item:
                     cached_items.append(cached_item.decode())
                 else:
-                    description = item.find("description")
 
                     normalize_xml_texts(item)