cleanup

changelog

• eb1b1381 don't use a T in the lib run_template test
• fbd503c6 remove the useless unwrap and TODO
• b550d712 remove some pub
• 339c3038 remove useless .iter()
• 537993f0 remove useless .add(...)
• d7720907 remove hiding_bound from timer in commit
• eecab5a6 move commit to inlined zk::batch_commit