Merge pull request #3202 from VWS-Python/unused-ignore-error

Make pyrefly error on unused ignore comments

Author: adamtheturtle

pyproject.toml

@@ -405,6 +405,7 @@ plugins = [
 
 [tool.pyrefly]
 errors.non-exhaustive-match = "error"
+errors.unused-ignore = "error"
 
 [tool.pyright]
 typeCheckingMode = "strict"