fix(.env): Remove duplicate

Author: timothystewart6

.env.example

@@ -4,7 +4,6 @@ GOOGLE_CLIENT_ID=XXX        # Google OIDC Client ID
 GOOGLE_CLIENT_SECRET=XXX    # Google OIDC Client Secret
 
 API_HOSTNAME=XXX            # Is needed for the OIDC Callback
-APP_HOSTNAME=XXX            # Is needed for the OIDC Callback
 
 CLOUDFLARE_TURN_ID=XXX      # Cloudflare TURN ID
 CLOUDFLARE_TURN_TOKEN=XXX   # Cloudflare TURN Token