Retire Playground Packwiz channel

scripts/build-site.sh

@@ -49,14 +49,6 @@ export_pack() {
 # release-tag event whose checked-out commit is intentionally older than main.
 export_pack "$dev_ref" forever "$site_root/forever/dev"
 
-# Playground is documented but intentionally incomplete today. Start serving
-# it automatically as soon as a committed playground/pack.toml exists.
-if export_pack "$dev_ref" playground "$site_root/playground/dev"; then
-  echo "Published playground development pack from $dev_ref"
-else
-  echo "Skipping playground: $dev_ref has no playground/pack.toml" >&2
-fi
-
 # Each forever-vX.Y.Z tag becomes an immutable URL. Version-aware Git sorting
 # also identifies the newest release to copy to the stable channel.
 release_tags=$(git tag --list 'forever-v*' --sort=-version:refname \