perf: remove needless collect

[zhangsoledad]

What is changed and how it works?

remove needless collect

Release note

Title Only: Include only the PR title in the release note.

[yangby-cryptape]

error: this boolean expression can be simplified
   --> verification/contextual/src/contextual_block_verifier.rs:185:12
    |
185 |         if !committed_ids.difference(&proposal_txs_ids).next().is_none() {
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `committed_ids.difference(&proposal_txs_ids).next().is_some()`
    |
    = note: `-D clippy::nonminimal-bool` implied by `-D warnings`
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool

error: aborting due to previous error

error: could not compile `ckb-verification-contextual`

[zhangsoledad]

#benchmark

[zhangsoledad]

bors r=yangby-cryptape,keroro520

[bors]

Build succeeded:

• ci_benchmarks_ubuntu
• ci_cargo_deny_ubuntu
• ci_integration_tests_ubuntu
• ci_linters_ubuntu
• ci_quick_checks_ubuntu
• ci_unit_tests_ubuntu
• ci_wasm_build_ubuntu