Don't pass conditions to #destroy_all.

git-svn-id: http://svn.redmine.org/redmine/trunk@15676 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/062_insert_builtin_roles.rb

@@ -11,6 +11,6 @@ class InsertBuiltinRoles < ActiveRecord::Migration
   end
 
   def self.down
-    Role.destroy_all 'builtin <> 0'
+    Role.where('builtin <> 0').destroy_all
   end
 end