Fix directory showing tags that have no currently eligible accounts (#9872)

app/controllers/directories_controller.rb

@@ -28,7 +28,7 @@ class DirectoriesController < ApplicationController
   end
 
   def set_tags
-    @tags = Tag.discoverable.limit(30)
+    @tags = Tag.discoverable.limit(30).reject { |tag| tag.cached_sample_accounts.empty? }
   end
 
   def set_accounts