feat : use guide login only [no ci]

.env.example

@@ -14,16 +14,6 @@ BETTER_AUTH_SECRET=replace-with-at-least-32-random-bytes
 # Separate trusted browser origins with commas for local development or proxies.
 BETTER_AUTH_TRUSTED_ORIGINS=http://localhost:3000
 
-# Optional Sudloh Account sign-in. A verified Sudloh administrator registers the
-# exact HTTPS callback at https://account.sudloh.com/account → OIDC clients.
-SUDLOH_OIDC_ISSUER=https://account.sudloh.com/api/auth
-SUDLOH_OIDC_CLIENT_ID=
-SUDLOH_OIDC_CLIENT_SECRET=
-SUDLOH_OIDC_REDIRECT_URI=
-# Set after linking existing Guide accounts to require Sudloh sign-in.
-SUDLOH_OIDC_ONLY=false
-SUDLOH_OIDC_PAUSED=false
-
 # Resend sending key; verify sudloh.com before sending from [email protected].
 RESEND_API_KEY=replace-with-resend-sending-key