Remove features asm, global_asm and llvm_asm

These features are now stable, as of the 19th of December! See
rust-lang/rust#87228

Author: linkmauve

luma_core/src/lib.rs

@@ -5,13 +5,7 @@
 //! **NOTE**: This is currently in a very experimental state and is subject to change.
 #![no_std]
 #![allow(unused_attributes)]
-#![feature(
-    global_asm,
-    asm,
-    asm_experimental_arch,
-    box_into_boxed_slice,
-    allocator_api
-)]
+#![feature(asm_experimental_arch, box_into_boxed_slice, allocator_api)]
 
 extern crate alloc;
 

luma_runtime/src/lib.rs

@@ -5,13 +5,7 @@
 //!
 //! **NOTE**: This is currently in a very experimental state and is subject to change.
 #![no_std]
-#![feature(
-    global_asm,
-    asm_experimental_arch,
-    lang_items,
-    llvm_asm,
-    alloc_error_handler
-)]
+#![feature(asm_experimental_arch, lang_items, alloc_error_handler)]
 
 use core::arch::global_asm;
 use core::{alloc::Layout, panic::PanicInfo};