Remove unused variable `use_spread` in record pattern matching code

scrapscript.py

···
         if not isinstance(obj, Record):
             return None
         result: Env = {}
-        use_spread = False
         seen_keys: set[str] = set()
         for key, pattern_item in pattern.data.items():
             if isinstance(pattern_item, Spread):
-                use_spread = True
                 if pattern_item.name is not None:
                     assert isinstance(result, dict)  # for .update()
                     rest_keys = set(obj.data.keys()) - seen_keys
                     result.update({pattern_item.name: Record({key: obj.data[key] for key in rest_keys})})
-                break
+                return result
             seen_keys.add(key)
             obj_item = obj.data.get(key)
             if obj_item is None:
···
                 return None
             assert isinstance(result, dict)  # for .update()
             result.update(part)
-        if not use_spread and len(pattern.data) != len(obj.data):
+        if len(pattern.data) != len(obj.data):
             return None
         return result
     if isinstance(pattern, List):