Update TOC.yml

Author: kromerm

articles/data-factory/TOC.yml

@@ -724,9 +724,7 @@ items:
       href: data-flow-alter-row.md
       displayName: upsert, update, insert, delete
     - name: Assert
-      href: data-flow-assert.md
-    - name: Cast
-      href: data-flow-cast.md      
+      href: data-flow-assert.md   
     - name: Conditional split
       href: data-flow-conditional-split.md
       displayName: split