fix: remove saveNotebookContent in JupyterCodeCellView

[HellowVirgil]

…IGTERM

Description

Please include a summary of the changes and the motivation behind them. Also, include any relevant context or links to related issues.

Type of Change

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• Bug fix
• New feature
• Documentation update
• Code refactoring
• Other (please describe):

Related Issues

Please list any issues related to this pull request (e.g., Fixes #123, Closes #456).

Testing

Please describe the tests that were performed to verify your changes. Include details about the testing framework, if applicable.

• Unit tests
• Integration tests
• Manual testing

Checklist

• My code follows the project’s coding style.
• I have updated the documentation as necessary.
• I have added tests to cover my changes.
• All new and existing tests pass.
• My changes require a change to the documentation.

Additional Notes

页面刷新时，前端与 Kernel 建立 WebSocket 连接的过程非常繁忙。此时如果并发地向 Server 发送 PUT 请求保存文件，容易与 Server 内部的状态同步（或文件锁）发生冲突。避免在 jupyter-code-cell-view 中调用 saveNotebookContent。