fix(pricefeed) Remove Extra page (#500)

Author: aditya520

pages/price-feeds/_meta.json

@@ -38,7 +38,6 @@
   "api-reference": "API Reference",
   "price-feeds": "Price Feeds",
   "sponsored-feeds": "Sponsored Feeds",
-  "asset-classes": "Asset Classes",
   "market-hours": "Market Hours",
   "best-practices": "Best Practices",
   "error-codes": "Error Codes",