Revert of Add noBarrierStore to WTF and use it for spinlocks

third_party/WebKit/Source/wtf/Atomics.h

Index: third_party/WebKit/Source/wtf/Atomics.h
diff --git a/third_party/WebKit/Source/wtf/Atomics.h b/third_party/WebKit/Source/wtf/Atomics.h
index 09b707e6f754336ddb7ab5cf99498b0c11417f3a..cdd631efe8aea48f021681350150f48f18274f7e 100644
--- a/third_party/WebKit/Source/wtf/Atomics.h
+++ b/third_party/WebKit/Source/wtf/Atomics.h
@@ -319,17 +319,6 @@
     return value;
 }
 
-ALWAYS_INLINE void noBarrierStore(volatile int* ptr, int value)
-{
-    *ptr = value;
-}
-
-ALWAYS_INLINE int noBarrierLoad(volatile const int* ptr)
-{
-    int value = *ptr;
-    return value;
-}
-
 #if defined(ADDRESS_SANITIZER)
 
 NO_SANITIZE_ADDRESS ALWAYS_INLINE void asanUnsafeReleaseStore(volatile unsigned* ptr, unsigned value)