From df8702fead4a26263f8a3f0a6fc36db1a8c37c7b Mon Sep 17 00:00:00 2001
From: Aratako <127325395+Aratako@users.noreply.github.com>
Date: Mon, 20 Mar 2023 03:01:03 +0900
Subject: [PATCH] Small fix: Remove unused variable `summary_message_role`
 (#1789)

After the changes in #1783, `summary_message_role` is no longer used in
`ConversationSummaryBufferMemory`, so this PR removes it.
---
 langchain/memory/summary_buffer.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/langchain/memory/summary_buffer.py b/langchain/memory/summary_buffer.py
index ae29f38a..0e5b4734 100644
--- a/langchain/memory/summary_buffer.py
+++ b/langchain/memory/summary_buffer.py
@@ -12,7 +12,6 @@ class ConversationSummaryBufferMemory(BaseChatMemory, SummarizerMixin, BaseModel
 
     max_token_limit: int = 2000
     moving_summary_buffer: str = ""
-    summary_message_role: str = "system"
     memory_key: str = "history"
 
     @property