remove references to retired training module

Author: khdownie

articles/storage/file-sync/TOC.yml

@@ -193,8 +193,6 @@
     href: /troubleshoot/azure/azure-storage/files/file-sync/file-sync-troubleshoot-managed-identities?toc=/azure/storage/file-sync/toc.json
 - name: Training
   items:
-  - name: Extend share capacity with Azure File Sync
-    href: /training/modules/extend-share-capacity-with-azure-file-sync/
   - name: Configure Azure Files and Azure File Sync
     href: /training/modules/configure-azure-files-file-sync/
   - name: Implement a hybrid file server infrastructure

articles/storage/file-sync/index.yml

@@ -73,8 +73,8 @@ landingContent:
         links:
           - text: Implement a hybrid file server infrastructure
             url: /training/modules/implement-hybrid-file-server-infrastructure/
-          - text: Extend your on-premises file share capacity using Azure File Sync
-            url: /training/modules/extend-share-capacity-with-azure-file-sync/
+          - text: Configure Azure Files and Azure File Sync
+            url: /training/modules/configure-azure-files-file-sync/
 
   # Card
   - title: Architecture

articles/storage/files/TOC.yml

@@ -301,8 +301,6 @@
   items:
   - name: Introduction to Azure Files
     href: /training/modules/introduction-to-azure-files/
-  - name: Extend share capacity with Azure File Sync
-    href: /training/modules/extend-share-capacity-with-azure-file-sync/
   - name: Configure Azure Files and Azure File Sync
     href: /training/modules/configure-azure-files-file-sync/
   - name: Implement a hybrid file server infrastructure