Merge pull request #367 from est31/remove_feature_gates

Remove some redundant/unused feature gates

.azure/azure-pipelines.yml

@@ -1,5 +1,5 @@
 variables:
-  lkg-rust-nightly: "2019-08-08"
+  lkg-rust-nightly: "2019-08-22"
 
 trigger:
   - master

src/lib.rs

@@ -1,11 +1,8 @@
 #![feature(crate_visibility_modifier)]
 #![feature(in_band_lifetimes)]
-#![feature(async_await)]
 #![feature(generators)]
 #![feature(try_trait)]
 #![feature(bind_by_move_pattern_guards)]
-#![feature(box_syntax)]
-#![feature(type_ascription)]
 #![feature(core_intrinsics)]
 #![feature(option_flattening)]
 #![feature(specialization)]

src/main.rs

@@ -1,9 +1,3 @@
-#![feature(crate_visibility_modifier)]
-#![feature(in_band_lifetimes)]
-#![feature(async_await)]
-#![feature(try_trait)]
-#![feature(bind_by_move_pattern_guards)]
-
 use clap::{App, Arg};
 use log::LevelFilter;
 use std::error::Error;

src/plugins/sys.rs

@@ -1,5 +1,3 @@
-#![feature(async_await)]
-
 use futures::executor::block_on;
 use futures::stream::StreamExt;
 use heim::{disk, memory, net};