Revert "fixed a bug in sampled_loss(), made compatible for 0.12.0"
Revert "fixed a bug in sampled_loss(), made compatible for 0.12.0"

xcyan/models,jazcollins/models,tombstone/models,tombstone/models,jiaphuan/models,bousmalis/models,hang-qi/models,zbigniewwojna/text-rcnn,jazcollins/models,bousmalis/models,derekjchow/models,wangyang59/tf_models,r888888888/models,sshleifer/object_detection_kitti,jazcollins/models,tombstone/models,cshallue/models,sshleifer/object_detection_kitti,r888888888/models,bousmalis/models,cshallue/models,alexgorban/models,hang-qi/models,r888888888/models,cshallue/models,jch1/models,wangyang59/tf_models,bousmalis/models,jiaphuan/models,derekjchow/models,jiaphuan/models,jiaphuan/models,jazcollins/models,alexgorban/models,cshallue/models,jch1/models,xcyan/models,tombstone/models,sshleifer/object_detection_kitti,r888888888/models,r888888888/models,xcyan/models,sshleifer/object_detection_kitti,cshallue/models,derekjchow/models,tombstone/models,jch1/models,xcyan/models,alexgorban/models,jazcollins/models,xcyan/models,tombstone/models,jazcollins/models,hang-qi/models,alexgorban/models,jch1/models,jch1/models,bousmalis/models,wangyang59/tf_models,r888888888/models,wangyang59/tf_models,sshleifer/object_detection_kitti,wangyang59/tf_models,derekjchow/models,jiaphuan/models,sshleifer/object_detection_kitti,bousmalis/models,jiaphuan/models,derekjchow/models,hang-qi/models,jch1/models,hang-qi/models,xcyan/models,wangyang59/tf_models,alexgorban/models,hang-qi/models