docs(self-hosted): remove deprecated github sso auth config (#12515)

Closes getsentry/self-hosted#3481

develop-docs/self-hosted/sso.mdx

@@ -86,17 +86,6 @@ When prompted for permissions, choose the following:
 
 You will then need to set the following configuration values:
 
-In [`sentry/sentry.conf.py`](https://github.com/getsentry/self-hosted/blob/master/sentry/sentry.conf.example.py)
-
-```python
-GITHUB_APP_ID="<App ID>"
-GITHUB_API_SECRET="<Client secret>"
-GITHUB_REQUIRE_VERIFIED_EMAIL = True  # Optional but recommended
-
-# Only if you are using GitHub Enterprise
-#GITHUB_BASE_DOMAIN = "git.example.com"
-#GITHUB_API_DOMAIN = "api.git.example.com"
-```
 In [`sentry/config.yaml`](https://github.com/getsentry/self-hosted/blob/master/sentry/config.example.yml)
 
 ```yaml
@@ -117,6 +106,7 @@ github-app.private-key: |
 # Only needed if you have multiple organizations enabled
 github-login.client-id: '<Client ID>'
 github-login.client-secret: '<Client secret>'
+github-login.require-verified-email: true # Optional but recommended
 ```
 
 This will also enable the [GitHub Integration](/integrations/github/) for your instance.