level not supported until ruby 2.4

config/environments/production.rb

@@ -28,7 +28,7 @@ CartoDB::Application.configure do
   # Note that we pass the desired log level to the logger's constructor;
   # assigning to `config.log_level` would have no effect here, since we have set the logger explicitly.
   config.logger = ActiveSupport::TaggedLogging.new(
-    ActiveSupport::Logger.new(Carto::Conf.new.log_file_path('production.log'), level: Logger::INFO)
+    ActiveSupport::Logger.new(Carto::Conf.new.log_file_path('production.log'))
   )
 
   config.log_level = :info

config/environments/staging.rb

@@ -25,7 +25,7 @@ CartoDB::Application.configure do
   # Note that we pass the desired log level to the logger's constructor;
   # assigning to `config.log_level` would have no effect here, since we have set the logger explicitly.
   config.logger = ActiveSupport::TaggedLogging.new(
-    ActiveSupport::Logger.new(Carto::Conf.new.log_file_path('staging.log'), level: Logger::INFO)
+    ActiveSupport::Logger.new(Carto::Conf.new.log_file_path('staging.log'))
   )
 
   config.log_level = :info