ruff

d5410ef9 - [syntax-errors] Make duplicate parameter names a semantic error (#17131)

[syntax-errors] Make duplicate parameter names a semantic error (#17131) Status -- This is a pretty minor change, but it was breaking a red-knot mdtest until #17463 landed. Now this should close #11934 as the last syntax error being tracked there! Summary -- Moves `Parser::validate_parameters` to `SemanticSyntaxChecker::duplicate_parameter_name`. Test Plan -- Existing tests, with `## Errors` replaced with `## Semantic Syntax Errors`.