Remove custom alloc_error_handler

rust-lang/rust#102318

Author: byeongkeunahn

basm/src/bin/basm-lib.rs

@@ -1,4 +1,3 @@
-#![feature(alloc_error_handler)]
 #![cfg_attr(not(test), no_builtins)]
 #![cfg_attr(not(test), no_std)]
 #![cfg_attr(not(test), no_main)]

basm/src/bin/basm-submit.rs

@@ -1,4 +1,3 @@
-#![feature(alloc_error_handler)]
 #![cfg_attr(not(test), no_builtins)]
 #![cfg_attr(not(test), no_std)]
 #![cfg_attr(not(test), no_main)]

basm/src/bin/basm.rs

@@ -1,4 +1,3 @@
-#![feature(alloc_error_handler)]
 #![cfg_attr(not(test), no_builtins)]
 #![cfg_attr(not(test), no_std)]
 #![cfg_attr(not(test), no_main)]

basm/src/bin/lang_items.rs

@@ -18,11 +18,6 @@ mod runtime {
         unsafe { core::hint::unreachable_unchecked() }
     }
 
-    #[alloc_error_handler]
-    fn alloc_fail(_: core::alloc::Layout) -> ! {
-        unsafe { core::hint::unreachable_unchecked() }
-    }
-
     #[no_mangle]
     #[allow(non_snake_case)]
     fn _Unwind_Resume() {