Update nightly, remove removed features.

examples/std/src/bin/net.rs

@@ -1,6 +1,4 @@
 #![feature(type_alias_impl_trait)]
-#![feature(min_type_alias_impl_trait)]
-#![feature(impl_trait_in_bindings)]
 #![allow(incomplete_features)]
 
 use clap::{AppSettings, Clap};

examples/std/src/bin/serial.rs

@@ -1,5 +1,3 @@
-#![feature(min_type_alias_impl_trait)]
-#![feature(impl_trait_in_bindings)]
 #![feature(type_alias_impl_trait)]
 #![allow(incomplete_features)]
 

examples/std/src/bin/tick.rs

@@ -1,5 +1,3 @@
-#![feature(min_type_alias_impl_trait)]
-#![feature(impl_trait_in_bindings)]
 #![feature(type_alias_impl_trait)]
 #![allow(incomplete_features)]