Remove redundant redirect_from entries across versioned IdentityServer documentation.

Author: khalidabuhakmeh

astro/src/content/docs/identityserver/reference/v8/efoptions/configuration.md

@@ -7,7 +7,6 @@ redirect_from:
   - /identityserver/v5/reference/efoptions/configuration/
   - /identityserver/v6/reference/efoptions/configuration/
   - /identityserver/reference/efoptions/configuration/
-  - /identityserver/reference/efoptions/configuration/
 ---
 
 ## Duende.IdentityServer.EntityFramework.Options.ConfigurationStoreOptions

astro/src/content/docs/identityserver/reference/v8/efoptions/index.md

@@ -8,7 +8,6 @@ redirect_from:
   - /identityserver/v5/reference/efoptions/
   - /identityserver/v6/reference/efoptions/
   - /identityserver/reference/efoptions/
-  - /identityserver/reference/efoptions/
 ---
 
 If using the [Entity Framework Core store implementation](/identityserver/data/ef.md), you might need to configure those specific options.

astro/src/content/docs/identityserver/reference/v8/efoptions/operational.md

@@ -7,7 +7,6 @@ redirect_from:
   - /identityserver/v5/reference/efoptions/operational/
   - /identityserver/v6/reference/efoptions/operational/
   - /identityserver/reference/efoptions/operational/
-  - /identityserver/reference/efoptions/operational/
 ---
 
 ## Duende.IdentityServer.EntityFramework.Options.OperationalStoreOptions

astro/src/content/docs/identityserver/reference/v8/endpoints/ciba.md

@@ -8,7 +8,6 @@ redirect_from:
   - /identityserver/v5/reference/endpoints/ciba/
   - /identityserver/v6/reference/endpoints/ciba/
   - /identityserver/reference/endpoints/ciba/
-  - /identityserver/reference/endpoints/ciba/
 ---
 
 The backchannel authentication endpoint is used by a client to initiate a [CIBA](/identityserver/ui/ciba.md) request.

astro/src/content/docs/identityserver/reference/v8/endpoints/discovery.md

@@ -9,7 +9,6 @@ redirect_from:
   - /identityserver/v5/reference/endpoints/discovery/
   - /identityserver/v6/reference/endpoints/discovery/
   - /identityserver/reference/endpoints/discovery/
-  - /identityserver/reference/endpoints/discovery/
 ---
 
 The [discovery endpoint](https://openid.net/specs/openid-connect-discovery-1_0.html) can be used to retrieve metadata