remove afdx geo-filtering

Author: duongau

articles/frontdoor/standard-premium/TOC.yml

@@ -39,8 +39,6 @@
     href: ../front-door-health-probes.md?toc=%2fazure%2ffrontdoor%2fstandard-premium%2ftoc.json
   - name: Wildcard domain
     href: ../front-door-wildcard-domain.md?toc=%2fazure%2ffrontdoor%2fstandard-premium%2ftoc.json
-  - name: Geo-filtering
-    href: geo-filtering.md
   - name: Rule Set
     items:
     - name: Rules Engine architecture