Remove unused code for Redis Sentinel.

Remove unused code for Redis Sentinel.

diff --git a/app/models/global_setting.rb b/app/models/global_setting.rb
index e141e15..9c5e67c 100644
--- a/app/models/global_setting.rb
+++ b/app/models/global_setting.rb
@@ -118,13 +118,6 @@ class GlobalSetting
         c[:db] = redis_db if redis_db != 0
         c[:db] = 1 if Rails.env == "test"
 
-        if redis_sentinels.present?
-          c[:sentinels] = redis_sentinels.split(",").map do |address|
-            host, port = address.split(":")
-            { host: host, port: port }
-          end.to_a
-        end
-
         c.freeze
       end
   end

GitHub sha: 5dc4b469

This commit has been mentioned on Discourse Meta. There might be relevant details there:

https://meta.discourse.org/t/support-for-redis-sentinel/163608/1