Revert kingfisher skip in container build workflow

Kingfisher will build via Nix on ringtail instead of Dockerfile on
indri, so the skip is no longer needed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.forgejo/workflows/build-container.yaml

@@ -46,18 +46,10 @@ jobs:
 
           echo "Changed containers: $CHANGED"
 
-          # Containers that are too resource-intensive to build on k8s (indri).
-          # These must be built locally and pushed manually.
-          SKIP_CONTAINERS="kingfisher"
-
           # Classify each container by build type (a container can appear in both)
           DOCKERFILE='[]'
           NIX='[]'
           for name in $(echo "$CHANGED" | jq -r '.[]'); do
-            if echo "$SKIP_CONTAINERS" | grep -qw "$name"; then
-              echo "Skipping $name (in SKIP_CONTAINERS — build locally)"
-              continue
-            fi
             has_any=false
             if [ -f "containers/$name/Dockerfile" ]; then
               DOCKERFILE=$(echo "$DOCKERFILE" | jq -c --arg n "$name" '. + [$n]')