also remove all button_classes usage

app/helpers/merged/merged_helper.rb

@@ -26,7 +26,7 @@ module Merged
 
     def last_change_class
       digit = last_change_digit
-      return button_classes if digit > 9
+      return "" if digit > 9
       digit = 9 - digit
       reds = { "1" => "bg-red-100","2" => "bg-red-200","3" => "bg-red-100",
                "4" => "bg-red-400","5" => "bg-red-500","6" => "bg-red-600",
@@ -34,7 +34,7 @@ module Merged
 
       clazz = reds[digit.to_s].to_s
       clazz += " " + "text-white" if digit > 7
-      button_classes + " " + clazz
+      clazz
     end
 
     def last_change_text
@@ -43,9 +43,5 @@ module Merged
       "#{digit} min. by #{ChangeSet.current.last_editor}"
     end
 
-    def button_classes
-      "mr-3 inline-block rounded-lg px-3 py-2 text-md font-medium border border-gray-500"
-    end
-
   end
 end