Hitting import issues on x86_64-unknown-linux-gnu from maybe_rayon crate

[ankur2136]

Error log.

error[E0432]: unresolved imports `maybe_rayon::current_num_threads`, `maybe_rayon::iter::IndexedParallelIterator`, `maybe_rayon::iter::IntoParallelRefIterator`, `maybe_rayon::slice::ParallelSliceMut`
Error:   --> packages/halo2curves/src/multicore.rs:8:5
   |
8  |     current_num_threads,
   |     ^^^^^^^^^^^^^^^^^^^ no `current_num_threads` in the root
9  |     iter::{IndexedParallelIterator, IntoParallelRefIterator},
   |            ^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^^ no `IntoParallelRefIterator` in `iter`
   |            |
   |            no `IndexedParallelIterator` in `iter`
10 |     slice::ParallelSliceMut,
   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `ParallelSliceMut` in `slice`
   |
help: a similar name exists in the module
   |
9  |     iter::{IntoParallelIterator, IntoParallelRefIterator},
   |            ~~~~~~~~~~~~~~~~~~~~
help: a similar name exists in the module
   |
9  |     iter::{IndexedParallelIterator, IntoParallelIterator},
   |                                     ~~~~~~~~~~~~~~~~~~~~
help: a similar name exists in the module
   |
10 |     slice::ParallelSlice,
   |            ~~~~~~~~~~~~~

For more information about this error, try `rustc --explain E0432`.
error: could not compile `halo2curves` (lib) due to previous error
Error: warning: build failed, waiting for other jobs to finish...
Error: Compiling your crate to WebAssembly failed
Caused by: Compiling your crate to WebAssembly failed
Caused by: failed to execute `cargo build`: exited with exit status: 101
  full command: cd "/home/runner/work/spartan-ecdsa-experiment/packages/spartan_wasm" && "cargo" "build" "--lib" "--release" "--target" "wasm32-unknown-unknown"

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Error: Process completed with exit code 1.

[huitseeker]

Try loading the crate excluding the default multicore feature (default-features = false in your dep).

[ankur2136]

How about something like this https://github.com/privacy-scaling-explorations/halo2curves/pull/117/files

[CPerezz]

How about something like this https://github.com/privacy-scaling-explorations/halo2curves/pull/117/files

Sorry, I completelly missed this.
I like the proposal more than what we have. Let me ping the teammates!

[duguorong009]

@CPerezz
I think we can close this issue, since multicore module is gone(maybe_rayon is replaced by rayon) in PR #122.
What do you think? sir
cc @ankur2136