Remove support for the changes trie

[tomaka]

This was done in paritytech/substrate#10080

[mergify]

Automatically approving tomaka's pull requests. This auto-approval will be removed once more maintainers are active.

[github-actions]

twiggy diff report

Difference in .wasm size before and after this pull request.

---

 Delta Bytes │ Item
─────────────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────
      +40606 ┊ smoldot::executor::host::ReadyToRun::run_once::h44f6f50a9acb50ca
      -40565 ┊ smoldot::executor::host::ReadyToRun::run_once::hbe6a37f274e042fb
       -2475 ┊ smoldot::header::hash_from_scale_encoded_header_vectored::h96c2cb935c0f42e8
       +2475 ┊ smoldot::header::hash_from_scale_encoded_header_vectored::hd703fc1f7d2d761e
       -2447 ┊ smoldot::header::decode_item::h5e4715a29bf974a1
       +2440 ┊ smoldot::executor::host::HostFunction::by_name::hbdfab49b699dcfbc
       -2440 ┊ smoldot::executor::host::HostFunction::by_name::hcd970ca7d2f2bfa0
       -2258 ┊ smoldot::header::DigestItemRef::scale_encoding::h0ea99433026e4712
       -2176 ┊ smoldot::executor::host::HostVmPrototype::run_vectored::h6d028d20759198a6
       +2176 ┊ smoldot::executor::host::HostVmPrototype::run_vectored::h74a53683296225bf
       +2074 ┊ smoldot::header::decode_item::hf5162a331a7580a3
       -2054 ┊ <alloc::vec::Vec<T,A> as core::clone::Clone>::clone::hbcb6872afc52eee7
       +2044 ┊ <core::iter::adapters::chain::Chain<A,B> as core::iter::traits::iterator::Iterator>::next::ha20e8f04e84a8e54
       -2044 ┊ <core::iter::adapters::chain::Chain<A,B> as core::iter::traits::iterator::Iterator>::next::ha24321ff30d29885
       +1983 ┊ smoldot::header::DigestItemRef::scale_encoding::h2612de2746949056
       +1900 ┊ <alloc::vec::Vec<T,A> as core::clone::Clone>::clone::h57da54b22d0af183
       +1853 ┊ smoldot::executor::host::HostFunction::name::ha87eda47b80f44ab
       -1853 ┊ smoldot::executor::host::HostFunction::name::hb9663696fae4b815
       +1425 ┊ <smoldot::executor::host::Error as core::fmt::Debug>::fmt::h1d0ec926fe9ae0d4
       -1425 ┊ <smoldot::executor::host::Error as core::fmt::Debug>::fmt::h3fe4dbbef1d2a179
       -1960 ┊ ... and 251 more.
       -4116 ┊ Σ [271 Total Rows]