remove duplicate vars in example env

Author: hmd-ali

.env.example

@@ -9,10 +9,12 @@ SERVER_ID=your_server_id_here
 GUIDES_CHANNEL_ID=your_guides_channel_id_here
 ADVENT_OF_CODE_CHANNEL_ID=your_advent_of_code_forum_channel_id_here
 REPEL_LOG_CHANNEL_ID=your_repel_log_channel_id_here
+ONBOARDING_CHANNEL_ID=onboarding_channel_id_here
 
 # Role IDs (REQUIRED)
 MODERATORS_ROLE_IDS=role_id_1,role_id_2,role_id_3
 REPEL_ROLE_ID=your_repel_role_id_here
+ONBOARDING_ROLE_ID=onboarding_role_id_here
 
 # Optional Role IDs
 # ROLE_A_ID=optional_role_a_id
@@ -22,16 +24,6 @@ REPEL_ROLE_ID=your_repel_role_id_here
 # Data Persistence (OPTIONAL)
 # Local development defaults to current directory
 # Docker deployments should use /app/data for persistence
-# Channel IDs (from your dev server)
-GUIDES_CHANNEL_ID=your-guide-channel-id
-REPEL_LOG_CHANNEL_ID=your-repel-log-channel-id
-ONBOARDING_CHANNEL_ID=onboarding-channel-id
-
-# Role IDs (from your dev server)
-REPEL_ROLE_ID=your-repel-role-id
-MODERATORS_ROLE_IDS=your-moderator-role-id
-ONBOARDING_ROLE_ID=onboarding-role-id
-# Other
 GUIDES_TRACKER_PATH=guides-tracker.json
 ADVENT_OF_CODE_TRACKER_PATH=advent-of-code-tracker.json