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`mrb_hash_delete` returns the removed element (which is guaranteed to
exist due to the `mrb_hash_key_p` check), this prevents the hash from
being searched twice.

Summary of Changes

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This pull request introduces a minor but effective performance optimization within the virtual machine's execution logic. By recognizing that mrb_hash_delete_key returns the removed element, a separate, redundant call to mrb_hash_get is no longer necessary. This change streamlines the process of retrieving and removing a keyword argument, reducing unnecessary hash table lookups and improving efficiency.

Highlights

Performance Optimization: Eliminated a redundant mrb_hash_get call by leveraging the return value of mrb_hash_delete_key, which now retrieves the element while deleting it, preventing a second hash lookup.

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