Don't disable inline asm usage in compiler-builtins when the cranelift backend is enabled

This was a leftover from when inline asm wasn't universally supported by
the cranelift backend yet. It would cause the optimized inline asm
intrinsics to be avoided for the standard library distributed with
rustup now that we build the cranelift backend by default on nightly for
several tier 1 targets.

src/bootstrap/src/core/build_steps/compile.rs

@@ -413,11 +413,6 @@ pub fn std_cargo(builder: &Builder<'_>, target: TargetSelection, stage: u32, car
 
     let mut features = String::new();
 
-    // Cranelift doesn't support `asm`.
-    if stage != 0 && builder.config.default_codegen_backend().unwrap_or_default() == "cranelift" {
-        features += " compiler-builtins-no-asm";
-    }
-
     if builder.no_std(target) == Some(true) {
         features += " compiler-builtins-mem";
         if !target.starts_with("bpf") {