Disable alloc_error_handler feature

Remove custom alloc_error_handler in favor of default one.

Author: mkroening

src/lib.rs

@@ -17,7 +17,6 @@
 #![feature(new_uninit)]
 #![feature(specialization)]
 #![feature(core_intrinsics)]
-#![feature(alloc_error_handler)]
 #![feature(strict_provenance)]
 #![feature(is_some_and)]
 #![cfg_attr(target_os = "none", no_std)]

src/runtime_glue.rs

@@ -1,7 +1,6 @@
 //! Minor functions that Rust really expects to be defined by the compiler,
 //! but which we need to provide manually because we're on bare metal.
 
-use alloc::alloc::Layout;
 use core::panic::PanicInfo;
 
 use crate::arch::core_local;
@@ -15,9 +14,3 @@ fn panic(info: &PanicInfo<'_>) -> ! {
 
 	syscalls::shutdown(1)
 }
-
-#[alloc_error_handler]
-fn rust_oom(layout: Layout) -> ! {
-	let size = layout.size();
-	panic!("memory allocation of {size} bytes failed")
-}