Update index.yml

remove duplicate link

Author: vac0224

articles/communication-services/index.yml

@@ -52,8 +52,6 @@ productDirectory:
         text: Send an SMS message
       - url: ./quickstarts/telephony/get-phone-number.md
         text: How to set up a phone number
-      - url: ./concepts/sms/sdk-features.md
-        text: SMS SDK overview
   - title: Email
     imageSrc: ./media/icons/email-icon.svg
     links: