get it working with latest rust

README.md

@@ -13,11 +13,5 @@ libpso = { path = "path/to/libpso" }
 ```
 at the end of the `Cargo.toml` file
 
-# rust nightly version
-```
-rustup override set nightly-2021-03-15
-```
-
-
 # to actually run it
 * `cargo run`

src/lib.rs

@@ -1,5 +1,4 @@
 #![allow(incomplete_features)]
-#![feature(const_generics)]
 #![feature(maybe_uninit_extra)]
 #![feature(inline_const)]
 #![feature(drain_filter)]