Temporarily disables the checkpoints for the readers.
Temporarily disables the checkpoints for the readers.

Summary:
The hive reader checkpoints are broken because of D5582328.
This breaks our offline simulator test as well.
This is a temporary fix that disables the checkpoints for readers.

Reviewed By: azzolini

Differential Revision: D5637719

fbshipit-source-id: 4f31ae534cb7e981fcacbb721cbb2420249fad91

Yangqing/caffe2,xzturn/caffe2,davinwang/caffe2,xzturn/caffe2,sf-wind/caffe2,pietern/caffe2,Yangqing/caffe2,pietern/caffe2,pietern/caffe2,Yangqing/caffe2,davinwang/caffe2,sf-wind/caffe2,xzturn/caffe2,davinwang/caffe2,xzturn/caffe2,davinwang/caffe2,xzturn/caffe2,Yangqing/caffe2,davinwang/caffe2,sf-wind/caffe2,pietern/caffe2,caffe2/caffe2,sf-wind/caffe2,Yangqing/caffe2,pietern/caffe2,sf-wind/caffe2