Merge pull request #782 from arduino/taddy/opta-certification-inconsistency-fix

[PC-1071] Arduino Opta: Certification inconsistencies fix

Author: TaddyHC

content/hardware/05.pro-solutions/solutions-and-kits/opta/product.md

@@ -2,7 +2,6 @@
 title: Opta
 url_shop: https://store.arduino.cc/pages/opta
 core: arduino:mbed_portenta
-certifications: [cULus listed, ENEC, CE]
 ---
 
 The **Arduino Opta** is a secure, easy-to-use **micro PLC** with Industrial IoT capabilities. Designed in partnership with **Finder**, leading industrial and building automation device manufacturer.