fix(ci): remove unnecessary checkout tokens in GPU CI, which are brok…

.github/workflows/gpu-tests.yml

@@ -8,7 +8,6 @@ env:
   RUST_BACKTRACE: "full"
   RUST_MIN_STACK: "8388608"
   IS_PULL_REQUEST: ${{ github.event_name == 'pull_request' }}
-  CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN || secrets.GITHUB_TOKEN }}
   # Secrets will be available only to zama-ai organization members
   SECRETS_AVAILABLE: ${{ secrets.JOB_SECRET != '' }}
 
@@ -61,7 +60,6 @@ jobs:
         with:
           fetch-depth: 0
           persist-credentials: 'false'
-          token: ${{ env.CHECKOUT_TOKEN }}
 
       - name: Check for file changes
         id: changed-files
@@ -136,7 +134,6 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
         with:
           persist-credentials: 'false'
-          token: ${{ env.CHECKOUT_TOKEN }}
           lfs: true
 
       - name: Checkout LFS objects