refactor(modules): remove twentyq genai integration

.env.example

@@ -19,10 +19,6 @@ OWNER_ID=
 # Comma-separated admin Telegram user ids (renamed from ADMIN_USER_IDS).
 ADMIN_IDS=
 
-# ============================ Optional ============================
-# Only the twentyq module needs this. Leave blank to disable that command.
-GEMINI_API_KEY=
-
 # The wc module uses football-data.org for World Cup schedule/live-score data.
 # Leave blank to keep /wc commands loaded but replying with a not-configured
 # message.