chore(github): remove unused actions

.github/workflows/rebase.yml

@@ -1,18 +0,0 @@
-on:
-  issue_comment:
-    types: [created]
-name: Automatic Rebase
-jobs:
-  rebase:
-    name: Rebase
-    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout the latest code
-      uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-    - name: Automatic Rebase
-      uses: cirrus-actions/rebase@1.5
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/sentry-release.yml

@@ -1,19 +0,0 @@
-on:
-  push:
-    tags:
-    - '*'
-name: Publish release on Sentry
-jobs:
-  deploy:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - name: Sentry Release
-      uses: getsentry/action-release@v1
-      env:
-        SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
-        SENTRY_ORG: ${{ secrets.SENTRY_ORG }}
-        SENTRY_PROJECT: rails
-      with:
-        environment: production
-        version: ${{ github.ref }}