Un-deprecate asm! macro

Author: Amanieu

src/libcore/macros/mod.rs

@@ -1296,14 +1296,6 @@ pub(crate) mod builtin {
         issue = "70173",
         reason = "inline assembly is not stable enough for use and is subject to change"
     )]
-    #[cfg_attr(
-        not(bootstrap),
-        rustc_deprecated(
-            since = "1.44.0",
-            reason = "the syntax of asm! will change soon, use llvm_asm! to avoid breakage",
-            suggestion = "llvm_asm",
-        )
-    )]
     #[rustc_builtin_macro]
     #[macro_export]
     macro_rules! asm {