Remove parser dependency from ruff-python-ast (#6096)

crates/ruff_python_formatter/src/module/mod_expression.rs

@@ -1,6 +1,6 @@
 use crate::{AsFormat, FormatNodeRule, PyFormatter};
 use ruff_formatter::{Format, FormatResult};
-use rustpython_parser::ast::ModExpression;
+use rustpython_ast::ModExpression;
 
 #[derive(Default)]
 pub struct FormatModExpression;