chore: Update README's License section

Author: Muscraft

README.md

@@ -15,8 +15,6 @@ An image tracking the Rust nightly toolchain is available via
 
 ## License
 
-Copyright The Rust Project Developers
-
 Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 [https://www.apache.org/licenses/LICENSE-2.0](https://www.apache.org/licenses/LICENSE-2.0)> or the MIT license
 <LICENSE-MIT or [https://opensource.org/licenses/MIT](https://opensource.org/licenses/MIT)>, at your