Remove unnecessary rescue
Remove unnecessary rescue

Following [rails] lead.

[rails]: https://github.com/rails/rails/commit/f1e4d3d8dd59c70cdf9af4f6e0a7a317fb93ef3c

deivid-rodriguez/activeadmin,mrjman/activeadmin,javierjulio/activeadmin,javierjulio/activeadmin,activeadmin/activeadmin,activeadmin/activeadmin,javierjulio/activeadmin,vraravam/activeadmin,vraravam/activeadmin,deivid-rodriguez/activeadmin,deivid-rodriguez/activeadmin,activeadmin/activeadmin,mrjman/activeadmin,mrjman/activeadmin,vraravam/activeadmin