Quote : " Online community Reddit has dropped its "warrant canary" from its latest transparency report. A warrant canary is a statement declaring that a website has not received any classified data requests from government or law enforcement. It is named after the early-warning birds which were taken down mine shafts to alert workers of toxic gases. Reddit's 2014 report stated it had not received any classified demands, but the 2015 update did not say this. "
More information about warrent canary found here : Canarywatch