std: Remove has_cpuid

The one use of it was guaranteed to be always true.

Author: workingjubilee

std/src/lib.rs

@@ -269,10 +269,6 @@
 #![cfg_attr(any(windows, target_os = "uefi"), feature(round_char_boundary))]
 #![cfg_attr(target_family = "wasm", feature(stdarch_wasm_atomic_wait))]
 #![cfg_attr(target_arch = "wasm64", feature(simd_wasm64))]
-#![cfg_attr(
-    all(any(target_arch = "x86_64", target_arch = "x86"), target_os = "uefi"),
-    feature(stdarch_x86_has_cpuid)
-)]
 //
 // Language features:
 // tidy-alphabetical-start

std/src/sys/pal/uefi/time.rs

@@ -175,10 +175,6 @@ pub(crate) mod instant_internal {
 
     #[cfg(target_arch = "x86_64")]
     fn timestamp_rdtsc() -> Option<Duration> {
-        if !crate::arch::x86_64::has_cpuid() {
-            return None;
-        }
-
         static FREQUENCY: crate::sync::OnceLock<u64> = crate::sync::OnceLock::new();
 
         // Get Frequency in Mhz
@@ -200,10 +196,6 @@ pub(crate) mod instant_internal {
 
     #[cfg(target_arch = "x86")]
     fn timestamp_rdtsc() -> Option<Duration> {
-        if !crate::arch::x86::has_cpuid() {
-            return None;
-        }
-
         static FREQUENCY: crate::sync::OnceLock<u64> = crate::sync::OnceLock::new();
 
         let freq = FREQUENCY