ci: remove team reviewers

Team reviewers is a nice feature that comes with a severe drawback: it
makes testing the workflows incredibly difficult as they won't work
without a similar token by the tester.

.github/workflows/add-reviewers.yml

@@ -13,7 +13,6 @@ jobs:
       - name: 'Request reviewers'
         uses: actions/github-script@v6
         with:
-          github-token: ${{ secrets.TEAM_REVIEW }}
           script: |
             const script = require('./.github/scripts/reviews.js')
             await script({github, context})

.github/workflows/labeler.yml

@@ -43,7 +43,6 @@ jobs:
       - name: 'Request reviewers'
         uses: actions/github-script@v6
         with:
-          github-token: ${{ secrets.TEAM_REVIEW }}
           script: |
             const script = require('./.github/scripts/reviews.js')
             await script({github, context})

.github/workflows/remove-reviewers.yml

@@ -12,7 +12,6 @@ jobs:
       - name: 'Remove reviewers'
         uses: actions/github-script@v6
         with:
-          github-token: ${{ secrets.TEAM_REVIEW }}
           script: |
             const script = require('./.github/scripts/remove-reviewers.js')
             await script({github, context})