fix structured summary condenser to use new interface.

removed import that lead to circular import.

Author: Carlos Freund

openhands/memory/condenser/__init__.py

@@ -1,4 +1,3 @@
-import openhands.memory.condenser.impl  # noqa F401 (we import this to get the condensers registered)
 from openhands.memory.condenser.condenser import (
     Condensation,
     Condenser,

openhands/memory/condenser/impl/structured_summary_condenser.py

@@ -196,7 +196,7 @@ def _truncate(self, content: str) -> str:
         """Truncate the content to fit within the specified maximum event length."""
         return truncate_content(content, max_chars=self.max_event_length)
 
-    def get_condensation(self, view: View) -> Condensation:
+    def get_condensation(self, view: View, state=None, agent=None) -> Condensation:
         head = view[: self.keep_first]
         target_size = self.max_size // 2
         # Number of events to keep from the tail -- target size, minus however many