Docs: remove azure and okta from generic oauth page (#23359)

docs/sources/auth/generic-oauth.md

@@ -54,24 +54,6 @@ Check for the presence of a role using the [JMESPath](http://jmespath.org/exampl
 
 See [JMESPath examples](#jmespath-examples) for more information.
 
-## Set up OAuth2 with Okta
-
-First set up Grafana as an OpenId client "webapplication" in Okta. Then set the Base URIs to `https://<grafana domain>/` and set the Login redirect URIs to `https://<grafana domain>/login/generic_oauth`.
-
-Finally set up the generic oauth module like this:
-
-```bash
-[auth.generic_oauth]
-name = Okta
-enabled = true
-scopes = openid profile email
-client_id = <okta application Client ID>
-client_secret = <okta application Client Secret>
-auth_url = https://<okta domain>/oauth2/v1/authorize
-token_url = https://<okta domain>/oauth2/v1/token
-api_url = https://<okta domain>/oauth2/v1/userinfo
-```
-
 ## Set up OAuth2 with Bitbucket
 
 ```bash
@@ -150,46 +132,6 @@ allowed_organizations =
     api_url = https://<domain>/userinfo
     ```
 
-## Set up OAuth2 with Azure Active Directory
-
-1.  Log in to portal.azure.com and click "Azure Active Directory" in the side menu, then click the "Properties" sub-menu item.
-
-2.  Copy the "Directory ID", this is needed for setting URLs later
-
-3.  Click "App Registrations" and add a new application registration:
-    - Name: Grafana
-    - Application type: Web app / API
-    - Sign-on URL: `https://<grafana domain>/login/generic_oauth`
-
-4.  Click the name of the new application to open the application details page.
-
-5.  Note down the "Application ID", this will be the OAuth client id.
-
-6.  Click "Certificates & secrets" and add a new entry under Client secrets
-    - Description: Grafana OAuth
-    - Expires: Never
-
-7.  Click Add then copy the key value, this will be the OAuth client secret.
-
-8.  Configure Grafana as follows:
-
-    ```bash
-    [auth.generic_oauth]
-    name = Azure AD
-    enabled = true
-    allow_sign_up = true
-    client_id = <application id>
-    client_secret = <key value>
-    scopes = openid email name
-    auth_url = https://login.microsoftonline.com/<directory id>/oauth2/authorize
-    token_url = https://login.microsoftonline.com/<directory id>/oauth2/token
-    api_url =
-    team_ids =
-    allowed_organizations =
-    ```
-
-> Note: It's important to ensure that the [root_url]({{< relref "../installation/configuration/#root-url" >}}) in Grafana is set in your Azure Application Reply URLs (App -> Settings -> Reply URLs)
-
 ## Set up OAuth2 with Centrify
 
 1.  Create a new Custom OpenID Connect application configuration in the Centrify dashboard.