Fix do not write result to stdout

[wzxxing]

Summary

Changes

Please provide a summary of what's being changed

There is no need to write the result to stdout, when server receive a stdin, it will response with the previously cached initialize result in the proxy client

User experience

Please share what the user experience looks like before and after this change

No changes. The client should get the same initialize result and successfully connect the session.

The reason for not handling this is that the handshake requires a notification too

Checklist

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• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change? (Y/N)

• Yes
• No

Please add details about how this change was tested.

• Did integration tests succeed?
• If the feature is a new use case, is it necessary to add a new integration test case?

Acknowledgment

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