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c4994e17d6
Automatic merge from submit-queue (batch tested with PRs 63603, 63557, 62015). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Clean up equiv cache with a simple implementation instead of LRU **What this PR does / why we need it**: The original version of equiv cache use pod hash as cache key, also, the predicate order is not fixed. So I used a LRU cache to improve hit rate. While now we've already refactored it to use predicates as keys, and its order was also fixed in scheduler, we can use a simplest cache instead now. **Special notes for your reviewer**: The question is brought up by @misterikkit **Release note**: ```release-note NONE ```