remove donmai-specific config options

config/danbooru_default_config.rb

@@ -349,11 +349,9 @@ module Danbooru
     end
 
     def shared_remote_key
-      "blah blah blah blah blah blah"
     end
 
     def report_server
-      "https://isshiki.donmai.us"
     end
 
     def enable_post_search_counts
@@ -398,19 +396,15 @@ module Danbooru
     end
 
     def twitter_site
-      "@teruyo"
     end
 
     def addthis_key
-      nil
     end
 
     def listbooru_server
-      "http://miura.donmai.us"
     end
 
     def listbooru_auth_key
-      ENV["LISTBOORU_AUTH_KEY"]
     end
   end
 end