Only display flash notifications for :alert and :notice keys

app/helpers/application_helper.rb

@@ -73,4 +73,8 @@ module ApplicationHelper
     Theme::AVAILABLE.invert
   end
 
+  def flash_notifications
+    flash.select { |type, _| [:notice, :alert].include?(type.to_sym) }
+  end
+
 end

app/views/shared/_flash.html.slim

@@ -1,3 +1,3 @@
-- flash.each do |type, message|
+- flash_notifications.each do |type, message|
   section.flash[class=type]
     .container = message