docs: Remove templates in readme (#792)

docs: Remove templates in readme

Issue: 404 when you click the [LangChain
Templates](https://github.com/langchain-ai/langchain/blob/master/templates/README.md)
in readme. As templates dir has been removed on latest langchain master.
<img width="368" alt="image"
src="https://github.com/user-attachments/assets/8dfa7e82-c6df-458c-ba42-2b9f0fd67d8d">


Fix: Just remove it to avoid 404 as example dirs is enough, look like
(my local vs code)
<img width="423" alt="image"
src="https://github.com/user-attachments/assets/b65fc053-ed62-47e4-8404-fbfbcb4b17d5">

Signed-off-by: Mingqi <[email protected]>
Co-authored-by: Eugene Yurtsev <[email protected]>

Author: Mingqi2

README.md

@@ -120,12 +120,7 @@ poetry run langchain serve --port=8100
 
 ## Examples
 
-Get your LangServe instance started quickly with
-[LangChain Templates](https://github.com/langchain-ai/langchain/blob/master/templates/README.md).
-
-For more examples, see the templates
-[index](https://github.com/langchain-ai/langchain/blob/master/templates/docs/INDEX.md)
-or the [examples](https://github.com/langchain-ai/langserve/tree/main/examples)
+Get your LangServe instances started quickly with the [examples](https://github.com/langchain-ai/langserve/tree/main/examples)
 directory.
 
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