fix validation warning

Author: halkazwini

articles/network-watcher/traffic-analytics-faq.yml

@@ -15,11 +15,6 @@ summary: |
 sections:
   - name: Ignored
     questions:
-      - question: |
-          What prerequisites are needed to use traffic analytics?
-        answer: |
-          See [Traffic analytics prerequisites](traffic-analytics.md#prerequisites) for a list of the required prerequisites.
-
       - question: |
           How can I check if I have the required roles?
         answer: |