remove review reminder workflow

.github/workflows/review-reminder.yml

@@ -1,19 +0,0 @@
-name: Review Reminder
-on:
-  schedule:
-    - cron: '*/9 * * * *'
-
-jobs:
-  deploy:
-    name: Review reminders
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v2
-
-    - uses: blombard/review-reminder@master
-      with:
-        token: "${{ secrets.GITHUB_TOKEN }}"
-        reminder-comment: "Don't forget to review this PR !"
-        days-before-reminder: '1'