chore: remove legacy TELEGRAM_USER_IDS from env-builder

Canonical var is TELEGRAM_ALLOWED_USERS. Processing fallback in start.sh
is kept for backward compat, but the UI should not expose the old alias.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

env-builder.js

@@ -1753,14 +1753,6 @@ const FIELDS = [
     "common": 1,
     "tag": "critical"
   },
-{
-    "g": "Telegram",
-    "icon": "✈️",
-    "k": "TELEGRAM_USER_IDS",
-    "lbl": "Telegram user IDs (comma)",
-    "type": "text",
-    "tag": "optional"
-  },
 {
     "g": "Deployment",
     "icon": "🧭",