[release/2025-11B] Remove reference to deleted core.yml pipeline variable template#6761

lbussell merged 2 commits intorelease/2025-11Bdotnet/dotnet-docker:release/2025-11Bfrom

backport/pr-6760-to-release/2025-11Bdotnet/dotnet-docker:backport/pr-6760-to-release/2025-11BCopy head branch name to clipboard