Remove the nullary intrinsic const eval logic and treat them like other intrinsics

Author: oli-obk

compiler/rustc_codegen_cranelift/example/mini_core_hello_world.rs

@@ -207,10 +207,10 @@ fn main() {
         assert_eq!(intrinsics::align_of::<u16>() as u8, 2);
         assert_eq!(intrinsics::align_of_val(&a) as u8, intrinsics::align_of::<&str>() as u8);
 
-        assert!(!intrinsics::needs_drop::<u8>());
-        assert!(!intrinsics::needs_drop::<[u8]>());
-        assert!(intrinsics::needs_drop::<NoisyDrop>());
-        assert!(intrinsics::needs_drop::<NoisyDropUnsized>());
+        assert!(!const { intrinsics::needs_drop::<u8>() });
+        assert!(!const { intrinsics::needs_drop::<[u8]>() });
+        assert!(const { intrinsics::needs_drop::<NoisyDrop>() });
+        assert!(const { intrinsics::needs_drop::<NoisyDropUnsized>() });
 
         Unique { pointer: NonNull(1 as *mut &str), _marker: PhantomData } as Unique<dyn SomeTrait>;