fix: remove canonical Anthropic skill duplicates

package.json

@@ -101,7 +101,6 @@
     "skills/blueprint/",
     "skills/brand-voice/",
     "skills/carrier-relationship-management/",
-    "skills/claude-api/",
     "skills/claude-devfleet/",
     "skills/clickhouse-io/",
     "skills/code-tour/",
@@ -147,7 +146,6 @@
     "skills/fal-ai-media/",
     "skills/finance-billing-ops/",
     "skills/foundation-models-on-device/",
-    "skills/frontend-design/",
     "skills/frontend-patterns/",
     "skills/frontend-slides/",
     "skills/github-ops/",