Rm irrelevant comment

examples/chat_agent_executor_with_function_calling/base.ipynb

@@ -80,7 +80,7 @@
     "## Set up the tools\n",
     "\n",
     "We will first define the tools we want to use.\n",
-    "For this simple example, we will use a built-in search tool via Tavily.\n",
+    "For this simple example, we will use create a placeholder search engine.\n",
     "However, it is really easy to create your own tools - see documentation [here](https://python.langchain.com/docs/modules/agents/tools/custom_tools) on how to do that.\n"
    ]
   },