Fix #8715 Update the remove func of binary search tree.

[yabea]

Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[rohan472000]

To resolve ruff issue, you need to modify the type annotations in lines 8 and 9. Instead of the current syntax, you should use the X | Y syntax.

[rohan472000]

Actually this error has been seen in a couple of PRs, even when there is no code written in that context, @cclauss plz look into it.

[yabea]

@rohan472000 I've fixed ruff error, but in fact, I also error when I pre-commit locally, maybe someone needs to check it out

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tianyizheng02]

@cclauss This should be closed now that #8752 has been merged and the issue has been fixed