Remove async_await feature gates

src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(crate_visibility_modifier)]
 #![feature(in_band_lifetimes)]
-#![feature(async_await)]
 #![feature(generators)]
 #![feature(try_trait)]
 #![feature(bind_by_move_pattern_guards)]

src/main.rs

@@ -1,6 +1,5 @@
 #![feature(crate_visibility_modifier)]
 #![feature(in_band_lifetimes)]
-#![feature(async_await)]
 #![feature(try_trait)]
 #![feature(bind_by_move_pattern_guards)]
 

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};