Delete unportable rule

Author: lucic71

rules/builtin/ir_unsafe.json

@@ -81,13 +81,6 @@
       "type": "bool"
     }
   },
-  "f11": {
-    "body": [
-      {
-        "text": "std::hint::spin_loop()"
-      }
-    ]
-  },
   "f2": {
     "body": [
       {

rules/builtin/src.cpp

@@ -23,6 +23,3 @@ int f7(unsigned long x) { return __builtin_ctzl(x); }
 int f8(unsigned long x) { return __builtin_popcountl(x); }
 bool f9(long a, long b, long *r) { return __builtin_mul_overflow(a, b, r); }
 bool f10(long long a, long long b, long long *r) { return __builtin_mul_overflow(a, b, r); }
-#if defined(__x86_64__) || defined(__i386__)
-void f11() { return __builtin_ia32_pause(); }
-#endif

rules/builtin/tgt_unsafe.rs

@@ -35,7 +35,3 @@ unsafe fn f10(a0: i64, a1: i64, a2: *mut i64) -> bool {
     *a2 = val;
     ovf
 }
-#[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
-unsafe fn f11() {
-    std::hint::spin_loop()
-}