Install jco via npm instead of git submodule

.github/workflows/build.yml

@@ -134,7 +134,6 @@ jobs:
           chmod +x ./build-exec
           # wait for docker exec to be ready
           timeout 10 bash -c 'until ./build-exec bundle config set --local without check; do sleep 1; done'
-      - run: ./build-exec rustup target add wasm32-wasip1 # For jco build
       - run: ./build-exec ./bin/setup
       - run: ./build-exec bundle exec rake compile
       - name: Pre-release configuration

CONTRIBUTING.md

@@ -9,8 +9,6 @@ This document describes development setup and pointers for diving into this proj
 $ git clone https://github.com/ruby/ruby.wasm --recursive
 $ cd ruby.wasm
 $ ./bin/setup
-# Just for building vendor/jco (will be removed soon)
-$ rustup target add wasm32-wasi
 # Compile extension library
 $ bundle exec rake compile
 $ rake --tasks

bin/setup

@@ -7,11 +7,4 @@ root="$(cd "$(dirname "$0")/.." && pwd)"
 
 env BUNDLE_GEMFILE="$root/Gemfile" bundle install
 
-# Build vendored jco if Rust toolchain is available and submodule is checked out
-if command -v rustc && [ -f vendor/jco/package.json ]; then
-  npm -C vendor/jco install
-  npm -C vendor/jco run build
-else
-  echo "Rust toolchain not found or jco submodule not checked out, skipping jco build"
-fi
 npm ci