Remove in-band lifetimes from the 2018 edition
Remove in-band lifetimes from the 2018 edition

As mentioned in the 2018-08-04 edition status update, these are postponed as lacking consensus to stabilize.

aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust