removed events and user group info
removed events and user group info

Summary: Closes https://github.com/caffe2/caffe2/pull/816

Differential Revision: D5276778

Pulled By: akyrola

fbshipit-source-id: 28bf0724a360e37cd3171eef9c47addf8b4e6b42

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