diff --git a/.github/reviewer-lottery.yml b/.github/reviewer-lottery.yml
deleted file mode 100644
index fd2fb1913f..0000000000
--- a/.github/reviewer-lottery.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-groups:
-  - name: devs
-    reviewers: 2
-    internal_reviewers: 1
-    usernames:
-      - syuilo
-      - acid-chicken
-      - EbiseLutica
-      - rinsuki
-      - tamaina
diff --git a/.github/workflows/reviewer_lottery.yml b/.github/workflows/reviewer_lottery.yml
deleted file mode 100644
index 33228d7465..0000000000
--- a/.github/workflows/reviewer_lottery.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: "Reviewer lottery"
-on:
-  pull_request_target:
-    types: [opened, ready_for_review, reopened]
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v1
-    - uses: uesteibar/reviewer-lottery@v2
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/storybook.yml b/.github/workflows/storybook.yml
deleted file mode 100644
index 6792674d9f..0000000000
--- a/.github/workflows/storybook.yml
+++ /dev/null
@@ -1,74 +0,0 @@
-name: Storybook
-
-on:
-  push:
-    branches-ignore:
-      - l10n_develop
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    env:
-      NODE_OPTIONS: "--max_old_space_size=7168"
-
-    steps:
-    - uses: actions/checkout@v3.3.0
-      with:
-        fetch-depth: 0
-        submodules: true
-    - name: Install pnpm
-      uses: pnpm/action-setup@v2
-      with:
-        version: 7
-        run_install: false
-    - name: Use Node.js 18.x
-      uses: actions/setup-node@v3.6.0
-      with:
-        node-version: 18.x
-        cache: 'pnpm'
-    - run: corepack enable
-    - run: pnpm i --frozen-lockfile
-    - name: Check pnpm-lock.yaml
-      run: git diff --exit-code pnpm-lock.yaml
-    - name: Build misskey-js
-      run: pnpm --filter misskey-js build
-    - name: Build storybook
-      run: pnpm --filter frontend build-storybook
-    - name: Publish to Chromatic
-      if: github.ref == 'refs/heads/master'
-      run: pnpm --filter frontend chromatic --exit-once-uploaded -d storybook-static
-      env:
-        CHROMATIC_PROJECT_TOKEN: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
-    - name: Publish to Chromatic
-      if: github.ref != 'refs/heads/master'
-      id: chromatic
-      run: |
-        DIFF="${{ github.event.before }} HEAD"
-        if [ "$DIFF" = "0000000000000000000000000000000000000000 HEAD" ]; then
-          DIFF="HEAD"
-        fi
-        CHROMATIC_PARAMETER="$(node packages/frontend/.storybook/changes.js $(git diff-tree --no-commit-id --name-only -r $(echo "$DIFF") | xargs))"
-        if [ "$CHROMATIC_PARAMETER" = " --skip" ]; then
-          echo "skip=true" >> $GITHUB_OUTPUT
-        fi
-        pnpm --filter frontend chromatic --exit-once-uploaded -d storybook-static $(echo "$CHROMATIC_PARAMETER")
-      env:
-        CHROMATIC_PROJECT_TOKEN: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
-    - name: Notify that Chromatic will skip testing
-      uses: actions/github-script@v6.4.0
-      if: github.ref != 'refs/heads/master' && github.ref != 'refs/heads/develop' && steps.chromatic.outputs.skip == 'true'
-      with:
-        github-token: ${{ secrets.GITHUB_TOKEN }}
-        script: |
-          github.rest.repos.createCommitComment({
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            commit_sha: context.sha,
-            body: 'Chromatic will skip testing but you may still have to [review the changes on Chromatic](https://www.chromatic.com/pullrequests?appId=6428f7d7b962f0b79f97d6e4).'
-          })
-    - name: Upload Artifacts
-      uses: actions/upload-artifact@v3
-      with:
-        name: storybook
-        path: packages/frontend/storybook-static