tree b15670894ad18a015ce7e2ca8bb97ef72e10a4cf
parent bed854c1daeb7408f861ec49fc3fb30770e1c49a
author Zhiyi Zhang <zhiyi@cs.ucla.edu> 1603243789 -0700
committer Zhiyi Zhang <zhiyi@cs.ucla.edu> 1603243789 -0700

clean up some comments

Change-Id: Ib2d096457e9c27b78703196ca13e18ee6cedafef