Remove V8_WARN_UNUSED_RESULT for simple getters.

src/platform/socket.h

Index: src/platform/socket.h
diff --git a/src/platform/socket.h b/src/platform/socket.h
index 6710692c544734cf882de92e13702686aed4e9e1..e9e2fa2eceb23395d8d348256ac20ad25a5aad8f 100644
--- a/src/platform/socket.h
+++ b/src/platform/socket.h
@@ -66,11 +66,11 @@ class Socket V8_FINAL {
   // Set the value of the SO_REUSEADDR socket option.
   bool SetReuseAddress(bool reuse_address);
 
-  V8_INLINE(bool IsValid()) const V8_WARN_UNUSED_RESULT {
+  V8_INLINE(bool IsValid()) const {
     return native_handle_ != kInvalidNativeHandle;
   }
 
-  static int GetLastError() V8_WARN_UNUSED_RESULT;
+  static int GetLastError();
 
   // The implementation-defined native handle type.
 #if V8_OS_POSIX
@@ -81,10 +81,10 @@ class Socket V8_FINAL {
   static const NativeHandle kInvalidNativeHandle = INVALID_SOCKET;
 #endif
 
-  NativeHandle& native_handle() V8_WARN_UNUSED_RESULT {
+  NativeHandle& native_handle() {
     return native_handle_;
   }
-  const NativeHandle& native_handle() const V8_WARN_UNUSED_RESULT {
+  const NativeHandle& native_handle() const {
     return native_handle_;
   }