[Area 1] Removing redundant overview pages (#18800)

Author: Maddy-Cloudflare

src/content/docs/email-security/account-setup/index.mdx

@@ -3,6 +3,8 @@ title: Account setup
 pcx_content_type: navigation
 sidebar:
   order: 3
+  group:
+    hideIndex: true
 
 ---
 

src/content/docs/email-security/deployment/inline/reference/egress-ips.mdx

@@ -3,7 +3,6 @@ title: Egress IPs
 pcx_content_type: reference
 sidebar:
   order: 1
-
 ---
 
 When you set up Email Security (formerly Area 1) using an [inline deployment](/email-security/deployment/inline/), you need to tell your existing email providers to accept messages coming from Email Security's egress IP addresses.

src/content/docs/email-security/deployment/inline/reference/index.mdx

@@ -3,6 +3,8 @@ title: Reference
 pcx_content_type: navigation
 sidebar:
   order: 3
+  group:
+    hideIndex: true
 head:
   - tag: title
     content: Reference - Inline deployment

src/content/docs/email-security/reference/index.mdx

@@ -3,7 +3,8 @@ title: Reference
 pcx_content_type: navigation
 sidebar:
   order: 8
-
+  group:
+    hideIndex: true
 ---
 
 import { DirectoryListing } from "~/components"