Revert "[rtsan][Apple] Add interceptor for _os_nospin_lock_lock (llvm#131034)"

This reverts commit 481a55a.

This change breaks compilation using Apple's internal SDK. This is a
temporary revert while we figure out the correct path forward. Reverting
upstream doesn't seem like the right thing to do given they don't have
access to the internal SDK.

rdar://147018451

Author: delcypher

compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp

@@ -30,12 +30,6 @@
 extern "C" {
 typedef int32_t OSSpinLock;
 void OSSpinLockLock(volatile OSSpinLock *__lock);
-// A pointer to this type is in the interface for `_os_nospin_lock_lock`, but
-// it's an internal implementation detail of `os/lock.c` on Darwin, and
-// therefore not available in any headers. As a workaround, we forward declare
-// it here, which is enough to facilitate interception of _os_nospin_lock_lock.
-struct _os_nospin_lock_s;
-using _os_nospin_lock_t = _os_nospin_lock_s *;
 }
 #endif // TARGET_OS_MAC
 
@@ -717,11 +711,6 @@ INTERCEPTOR(void, os_unfair_lock_lock, os_unfair_lock_t lock) {
   __rtsan_notify_intercepted_call("os_unfair_lock_lock");
   return REAL(os_unfair_lock_lock)(lock);
 }
-
-INTERCEPTOR(void, _os_nospin_lock_lock, _os_nospin_lock_t lock) {
-  __rtsan_notify_intercepted_call("_os_nospin_lock_lock");
-  return REAL(_os_nospin_lock_lock)(lock);
-}
 #define RTSAN_MAYBE_INTERCEPT_OS_UNFAIR_LOCK_LOCK                              \
   INTERCEPT_FUNCTION(os_unfair_lock_lock)
 #else

compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp

@@ -1122,25 +1122,6 @@ TEST(TestRtsanInterceptors, OsUnfairLockLockDiesWhenRealtime) {
   ExpectRealtimeDeath(Func, "os_unfair_lock_lock");
   ExpectNonRealtimeSurvival(Func);
 }
-
-// We intercept _os_nospin_lock_lock because it's the internal
-// locking mechanism for MacOS's atomic implementation for data
-// types that are larger than the hardware's maximum lock-free size.
-// However, it's a private implementation detail and not visible in any headers,
-// so we must duplicate the required type definitions to forward declaration
-// what we need here.
-extern "C" {
-struct _os_nospin_lock_s {
-  unsigned int oul_value;
-};
-void _os_nospin_lock_lock(_os_nospin_lock_s *);
-}
-TEST(TestRtsanInterceptors, OsNoSpinLockLockDiesWhenRealtime) {
-  _os_nospin_lock_s lock{};
-  auto Func = [&]() { _os_nospin_lock_lock(&lock); };
-  ExpectRealtimeDeath(Func, "_os_nospin_lock_lock");
-  ExpectNonRealtimeSurvival(Func);
-}
 #endif
 
 #if SANITIZER_LINUX