[Refactor, Fix]: Agent controller state/metrics management (#9012)

Co-authored-by: openhands <openhands@all-hands.dev>

openhands/runtime/utils/edit.py

@@ -305,7 +305,6 @@ class FileEditRuntimeMixin(FileEditRuntimeInterface):
             return ErrorObservation(error_msg)
 
         content_to_edit = '\n'.join(old_file_lines[start_idx:end_idx])
-        self.draft_editor_llm.reset()
         _edited_content = get_new_file_contents(
             self.draft_editor_llm, content_to_edit, action.content
         )