fix: remove leftover secrets (#2415)

Author: gsanchezgavier

.github/workflows/prerelease.yml

@@ -202,5 +202,3 @@ jobs:
     secrets:
       AWS_ROLE_ARN: ${{ secrets.AWS_ROLE_ARN }}
       AWS_VPC_SUBNET: ${{ secrets.AWS_VPC_SUBNET }}
-      AC_CANARY_WINDOWS_PASSWORD: ${{ secrets.AC_CANARY_WINDOWS_PASSWORD }}
-      SLACK_WEBHOOK_URL: ${{ secrets.AC_SLACK_WEBHOOK }}