Nuke OS::ReleaseStore, use Release_Store instead

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
index 35427d4d19433518cb884a678543fc835673ba21..bda9f923fd68516dd4fea9d83d115958f62e0ae2 100644
--- a/src/platform-cygwin.cc
+++ b/src/platform-cygwin.cc
@@ -79,12 +79,6 @@ int OS::ActivationFrameAlignment() {
 }
 
 
-void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) {
-  __asm__ __volatile__("" : : : "memory");
-  // An x86 store acts as a release barrier.
-  *ptr = value;
-}
-
 const char* OS::LocalTimezone(double time) {
   if (std::isnan(time)) return "";
   time_t tv = static_cast<time_t>(floor(time/msPerSecond));