ci: revert FORCE_JAVASCRIPT_ACTIONS_TO_NODE24, let v4 actions run on Node.js 20

.github/workflows/ci.yml

@@ -10,7 +10,6 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
 
 jobs:
   # Test job

.github/workflows/opencode.yml

@@ -1,34 +0,0 @@
-name: opencode
-on:
-  issue_comment:
-    types: [created]
-  pull_request_review_comment:
-    types: [created]
-
-env:
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
-
-jobs:
-  opencode:
-    if: |
-      contains(github.event.comment.body, '/oc') ||
-      contains(github.event.comment.body, '/opencode')
-    runs-on: ubuntu-latest
-    permissions:
-      id-token: write
-      contents: write
-      pull-requests: write
-      issues: write
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 1
-
-      - name: Run OpenCode
-        uses: anomalyco/opencode/github@latest
-        env:
-          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
-        with:
-          model: anthropic/claude-sonnet-4-20250514