ci: actually fix check_updates.yml

WOW.

Author: dsherret

.github/workflows/check_updates.yml

@@ -20,7 +20,6 @@ jobs:
           token: ${{ secrets.GH_DPRINTBOT_PAT }}
 
       - uses: denoland/setup-deno@v1
-      - uses: actions/checkout@v2
       - uses: dtolnay/rust-toolchain@stable
 
       - name: Run script