Update articles/synapse-analytics/migration-guides/index.yml

Co-authored-by: William Assaf MSFT <[email protected]>

Author: MarkPryceMaherMSFT

articles/synapse-analytics/migration-guides/index.yml

@@ -51,8 +51,6 @@ landingContent:
             url: https://customers.microsoft.com/story/845578-co-op-retailers-azure
           - text: "Customer story: Neogrid"
             url: https://customers.microsoft.com/en-GB/story/816187-neogrid-professional-services-azure-synapse-analytics
-          - text: "Customer story: Walgreens"
-            url: https://customers.microsoft.com/en-us/story/778746-walgreens-retailers-azure-analytics
   - title: From IBM Netezza
     linkLists: 
       - linkListType: overview