Apply old deprecations#2883

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Pierre-Sassoulas wants to merge 3 commits intomainfrom

apply-old-deprecation

Commits on Nov 9, 2025

Remove safe_infer import from astroid.helpers
Pierre-Sassoulas
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Remove the rec argument from 'find_argname' as promised
Pierre-Sassoulas
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Remove '_instancecheck' from the codebase as promised for astroid 2.0
Pierre-Sassoulas
committed