remove xdr items

Author: dstrome

defender-office-365/breadcrumb/toc.yml

@@ -5,7 +5,4 @@
    - name: 'Microsoft Defender for Office 365'
      tocHref: /defender-office-365/
      topicHref: /defender-office-365/index
-     items:
-      - name: 'Microsoft Defender XDR'
-        tocHref: /defender-xdr/
-        topicHref: /defender-xdr/pilot-deploy-defender-endpoint
+