Rollup merge of rust-lang#58723 - Centril:deny-elided_lifetimes_in_paths-librustc, r=oli-obk

librustc: deny(elided_lifetimes_in_paths)

As part of the Rust 2018 transition, remove `#![allow(elided_lifetimes_in_paths)]` from `librustc`.

r? @oli-obk

Author: Centril

src/librustc/lib.rs

@@ -62,8 +62,6 @@
 
 #![recursion_limit="512"]
 
-#![warn(elided_lifetimes_in_paths)]
-
 #[macro_use] extern crate bitflags;
 extern crate getopts;
 #[macro_use] extern crate lazy_static;