Merge pull request #86 from Rust-for-Linux/rust-extern-crate

libkernel: remove leftover `extern crate`

Author: ojeda

rust/kernel/lib.rs

@@ -10,8 +10,6 @@
 #[cfg(not(CONFIG_RUST))]
 compile_error!("Missing kernel configuration for conditional compilation");
 
-extern crate alloc;
-
 use core::panic::PanicInfo;
 
 mod allocator;