DEV: Upgrade Rails to 7.1

lib/discourse.rb

@@ -1116,16 +1116,7 @@ module Discourse
       end
     end
 
-    schema_cache = ActiveRecord::Base.connection.schema_cache
-
     RailsMultisite::ConnectionManagement.safe_each_connection do
-      # load up schema cache for all multisite assuming all dbs have
-      # an identical schema
-      dup_cache = schema_cache.dup
-      # this line is not really needed, but just in case the
-      # underlying implementation changes lets give it a shot
-      dup_cache.connection = nil
-      ActiveRecord::Base.connection.schema_cache = dup_cache
       I18n.t(:posts)
 
       # this will force Cppjieba to preload if any site has it