refactor: remove unused code and redundant check in NonceManager#58

re1ro merged 2 commits intofeat/nonce-treeeco/permit3:feat/nonce-treefrom

claude/pr55-address-feedback-01Mu5xjLme7mv5nn2QUpN6XQeco/permit3:claude/pr55-address-feedback-01Mu5xjLme7mv5nn2QUpN6XQCopy head branch name to clipboard