fix: added redirects to migrated content

Author: mehreentahir16

src/data/nav.yml

@@ -25,8 +25,6 @@
           url: '/collect-data/monitor-your-application/query-custom-data'
     - title: Monitor your network devices
       url: '/collect-data/network-performance-monitoring'
-    - title: Identify root cause issues in your infrastructure
-      url: '/collect-data/infra'
     - title: Estimate data ingest and cost
       url: '/collect-data/estimate-cost'
     - title: Troubleshoot your website with New Relic browser