chore(picker): update metadata.json

Author: marissahuysentruyt

components/picker/dist/metadata.json

@@ -281,7 +281,6 @@
     "--spectrum-gray-500",
     "--spectrum-gray-600",
     "--spectrum-gray-700",
-    "--spectrum-gray-800",
     "--spectrum-gray-900",
     "--spectrum-line-height-100",
     "--spectrum-negative-border-color-default",