Use `try` instead of `repond_to?` and a method call

app/models/award_emoji.rb

@@ -37,8 +37,6 @@ class AwardEmoji < ActiveRecord::Base
   end
 
   def expire_etag_cache
-    return unless awardable.respond_to?(:expire_etag_cache)
-
-    awardable.expire_etag_cache
+    awardable.try(:expire_etag_cache)
   end
 end