GeezerVison

PR Summary

This is a simple optimizaton as many consumers that construct the TokenOperations class do not call APIs that use the LinkedList. This changes the CPU consumption of this class constructor during a format run from 8% to 1%. Of course one could optimize further but I suggest to do the quick wins first with little risk of code regression.
Performance gains are mainly in formatter rules but also in relatively expensive UseSupportsShouldProcess rule.

Also remove unused method. Technically this is a breaking change due to them being publicly exposed but I don't think people use them, the only usage that I can imagine is in custom rules. I did a global GitHub search and it confirmed that no one is probably using those APIs.

This class is quite disgusting overall, littered with TODOs and private/public methods spread across the file. Idea is to keep changes minimal and safe.

PR Checklist

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• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
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