Removed entry from TOC

Author: DeCohen

CloudAppSecurityDocs/toc.yml

@@ -296,8 +296,6 @@ items:
       href: activity-filters-queries.md
     - name: Investigate apps discovered by Microsoft Defender for Endpoint
       href: mde-investigation.md
-    - name: Investigate files
-      href: file-filters.md
     - name: Investigate accounts from connected apps
       href: accounts.md
     - name: Investigate OAuth apps