Remove accidental empty block at the bottom of `split-static-string (SIM905)` doc (#15290)

## Summary

Removes the following empty code block

![image](https://github.com/user-attachments/assets/4adbacac-0bd9-4dac-af3a-93da2619a1cb)

crates/ruff_linter/src/rules/flake8_simplify/rules/split_static_string.rs

@@ -41,7 +41,6 @@ use crate::checkers::ast::Checker;
 ///
 /// ## References
 /// - [Python documentation: `str.split`](https://docs.python.org/3/library/stdtypes.html#str.split)
-/// ```
 #[derive(ViolationMetadata)]
 pub(crate) struct SplitStaticString;